Tap dancing was my favorite hobby as a kid. It was probably a good study in coordination, posture, etc., but I don't find a reason to breakout the tap-dance moves too often.
I wish I would have spent more time learning an instrument; that would have been more of a lifelong pursuit.
Although, my dance training did give me a huge appreciation for the arts. I am a regular at the Northrop Dance Series events, which are a HUGE bargain to see high-quality, touring dance companies.
http://www1.umn.edu/umato/dance_2008/index.html

We did this thing where a group of about 5 of us would line our bike up in the middle of the (lightly-traveled) road and play bike dominos. That was after we would take one more step each into "the haunted house" about a mile out of town. Oh yeah, pretty cool.
At night we'd play kick the can or some other games I can't remember the name of.
We did a whole lotta hoopin' too.