Other Rocket Clubs:

SMASH:  Southwest Michigan Association of Spacemodeling Hobbyists  (Dual membership with MMAR)
HUVARS:  Huron Vally Rocket Society
MICHIANA ROCKETRY:  Michigan / Indiana Rocket Club
JMRC:  Jackson Michigan Rocketry Club

Hobby Shops & Suppliers:

House of Hobbies:  962  W  Broadway, Muskegon, MI  1-231-759-4555
Red Arrow Hobbies:  5095 Red Arrow Hwy, Stevensville, MI
Impulse Buys: On-site motor dealer for your rocketry needs & on web
Commonwealth: 12649 Dix-Toledo Rd, Southgate,  MI  48195
Miller Motor Works: 1756 Grant Dr, Allegan, MI 49010
eRockets: 2790 Thunderhawk Ct, Dayton, OH 45414

Organizations:

NAR: National Association of Rocketry
TRIPOLI Rocketry Association, Inc.