Ken Larsen's web site - Dancing
I regularly do contra dancing and swing dancing.
Contra dancing is a hybrid of line dancing and square dancing. Like square dancing, a "caller" calls out the moves. That makes it less intimidating to people who have never danced before.
I belong to the Triangle Country Dancers, a contra dance group, and the Triangle Swing Dance Society. Both are extremely well organized and precede their dances with a beginner lesson. Their dances have live bands and are smoke-free and alcohol free. That appeals to me, because I neither smoke nor drink.