As promised, we had belly rubbing:
We didn't have a huge turnout, but it ended up perfect: everyone got to sing several times, with basically no wait, and we could visit and still hear each other sing. Plus, karaoke is just more fun when you know and love every person in the room. It was really, really, really the perfect party for us. Thank you so much to everyone who came, even if you didn't sing.
I'll work on posting at least a partial list of songs performed, after Shaun wakes up from his nap. We're not accustomed to partying like rockstars, apparently.