Rita, you gots my e-mail? Go ahead and sock them old files to me, mama.

Honestly, the sing-arounds are ok, but...
They're always packed and if one sits in the wrong place, there will be oodles of people ahead of you, there will be chatting in between songs, and there will be the inevitable 214 verse ballad. (Not that there's anything wrong with that.) Anyway, once you're at the arse end of a line, you've got a skunk's chance on the beltway of getting to sing. That won't stop me from going to the sing-arounds though.

Strategic butt-parking: go for the middle if you can't bribe the leader. Ends are BAD. Non-scheduled singing doesn't have a time limit so folks don't feel pressed to 'get on with it'.

Sign of a good, albeit frustrating, schedule: there isn't much you DON'T want to go to.