zumba (Summum crazy) is a slang of the District of Columbia. Means Samba dance rhythms. The combination of the words "crazy crowd" means a party to a zumba dance party fun there.
Zumba is an aerobic dance which combines Latin, hip-hop and belly dancing moves with energetic music to provide a fun, great workout. Zumba aims to make exercise exciting and fun.
Beginning Zumba Tips