I am nervous. I never get nervous for OLD because I don't even know the person and I am so whatever about it. This one freaks me out a little more given our mutual acquaintances and me liking him already. Hopefully all will go well.
Ginger,
If the guy said that he'd only go do the dancing thing if you're his partner, then that means he likes you too. He probably likes you lots and lots. Just remember the rule, no skinny dipping on the first date. The other rule is, sometimes it's ok to break the rules.