One of the ways you can enjoy fireworks legally is to join a fireworks or pyro club!  There are dozens of Pyro Clubs throughout the United States. These Fireworks clubs provide a legal area to shoot fireworks, and offer opportunities to be able to learn how to shoot fireworks safely. Some clubs even provide a means for members to purchase fireworks at a discount, and to learn how to build and shoot commercial/display fireworks.
 
Nearly all of the fireworks clubs in the United States are also endorsed by the Pyrotechnics Guild International (PGI). The PGI provides resources, course materials, written publications, and guidance to clubs and PGI members. In addition, the PGI holds an annual convention each year that allows members to get together to exchange ideas and view some of the best fireworks in the world. You should consider joining the PGI if you are not already a member.  
Here is a list of the fireworks clubs in the United States:
 
USFireworks.biz Facebook Club - Backyard Fireworks Group
https://www.facebook.com/groups/371865067098009/?source_id=89164158955

About the Backyard Fireworks Group: A Facebook Group dedicated to the backyard fireworks enthusiast!    Join the group, connect with liked mined people, learn about safe show set-up, get free DIY info, get access to special discounts and deals from USFireworks.biz!

American Pyrotechnics Association (APA) 
www.americanpyro.com

Julie Heckman, (301) 907-8181 jheckman@americanpyro.com

About the American Pyrotechnics Association (APA): The APA is the premier trade association of the fireworks industry. The APA was founded in 1948 with three principle aims: to encourage safety in the design and use of all types of fireworks; to provide industry information and support to our members; and to promote responsible regulation of the fireworks industry.

Bluegrass Pyrotechnic Guild, Inc. (BPAG)
http://www.bluegrasspyro.org

About the Bluegrass Pyrotechnic Guild: The BPG was founded in the mid-'90s, and we have members from KY, TN, VA, OH, IN, IL, and other states. Our membership includes both professional and amateur pyro enthusiasts who get together 8-10 times a year for meetings / shoots / seminars / safety trainings. We welcome anyone who is interested in the art of fireworks.
 

Carolina Pyros, Inc.
www.carolinapyros.org

Mike Russell president@carolinapyros.org

About the Carolina Pyros: We are a not for profit social club whose sole mission is to share our passion for fireworks with others. We provide opportunities for pyro enthusiasts to work with and learn from some of the best professionals on the East Coast. Spending time together in the field with others that share the passion is priceless. The pyro brotherhood is real!

Crackerjacks Fireworks Club
http://www.crackerjacks.org
For More Info:
* Ben Sego, (703) 242-2272 bsego@methodin.com
* Norman Whetzel, (703) 787-8786 nwhetzel@iamdigex.net
 

About the Crackerjacks Fireworks Club: CrackerJacks is one of the oldest and largest regional fireworks clubs in the United States. Our club’s activities; shoots, meetings, classes and hands-on seminars, are typically held in Virginia, Pennsylvania and Maryland. Even so, our membership spans the country with members hailing from the Carolina’s, Florida, Connecticut and Washington.

Florida Pyrotechnic Arts Guild (FPAG)

www.fpag.org

More Info: officers@fpag.org

About the Florida Pyrotechnic Arts Guild:  (FPAG) is a group of fireworks enthusiasts and professionals that practice and promote safety in fireworks, as well as safely building and displaying fireworks. We meet each month at locations around Florida to share information, demonstrate techniques and best practices, and hang out with other pyrotechnic-minded people. We also have Spring (2F) and Fall (4F) festivals.

Midlands Pyro Association
http://www.midlandpyroassociation.com
For More Info:
* president@midlandspyroassociation.com

About the Midlands Pyro Association: Founded in 2010, we are a geographically diverse multi-state club with members from South Dakota, Iowa, Missouri, Kansas, and Nebraska, roughly centered in eastern Nebraska. Our membership consists of individuals and businesses who share a common love of all things pyrotechnic. Whether you enjoy shooting 1.3 or 1.4 pyro, manufacturing your own devices, choreographing displays, or simply watching the night sky light up with spectacular displays of color and noise, the MPA is a club built just for you.
 

MoPyro
http://www.mopyro.org
For More Info:
* Noel Zimmerman, (314) 961-5636 noelz1@aol.com
About MoPyro: Our Mission is to promote and encourage the safe, legal, and artful use of pyrotechnic material and compositions, through training, demonstrations, displays, educational material, and exchange of information.

Michigan Pyrotechnics Art Guild
http://www.mpag.org
For More Info:
* Aaron Enzer, (734) 428-0900 aaron@ace-e.com
About the Michigan Pyrotechnics Art Guild: MPAG was incorporated in January, 1999, with the express purpose of providing the Michigan fireworks enthusiast an opportunity to share their love of energetic artistry with others of like mind.  MPAG members share a common passion for the art, craft and science of fireworks. 

 
New Hampshire Pyrotechnics Association
http://clubs.yahoo.com/clubs/nhpa2
For More Info:
* Dave Pierson, (978) 897-9729 davep@quik.com
 
Ohio Pyrotechnics Guild (OPAG)
http://www.opag.org
 
Pyrotechnic Artists, Inc. (The Pennsylvania club)
http://www.pyroartists.org
 
Pyrotechnic Artists of Texas (The Texas Fireants)
http://www.fireants.org
For More Info:
* Ken Barton, (972) 276-4561 fireant01@verizon.net
 
Rocky Mountain Pyrotechnics Guild
http://www.rmpg.org
For More Info:
* Steve or Micki McDanal info@www.rmpg.org
 
Stumptown Shooters
www.stumptownshooters.org
For More Info:
* Gene Zdrazil, (319) 629-5162 gzdrazil@msn.com
 
Western New York Pyrotechnic Association
www.wnypa.com
For More Info:
* Bob Leo, (585) 826-4921 skyartist@wnypa.com
 
Western Pyrotechnic Association
http://www.westernpyro.org
For More Info:
* Kief Adler kief@sbcglobal.net
* Tom Calderwood tom@westernpyro.org
 
Wisconsin Pyrotechnic Arts Guild
http://www.wpag.us
For More Info:
* Steve Hubing, (715) 238-7712 shubing@tznet.com