Activities:
1) I can get on board with ballet and gymnastics. That would be cool animation to pull off.
2) I'm a drummer. It's the one "rock-band" instrument not yet supported - we have guitars, singers (I was very excited when they added that), and keyboards now. I would love to see drums added, and have a "club" like game-mechanic where you can start a band, and make money playing at gigs/venues, etc, just like working the DJ gig can make money. The mechanic that allows synchronized dancing would be relevant to making synchronized music. I could see the drummers being very clumsy at the beginning with very horrible rhythms (like the other instruments at low skill level) but eventually twirling sticks, tossing them up and catching them, etc.
3) Pole-Dancing
4) Billiards (pool).
NEW VENUE
Amusement Park / Fair / Carnival