@ tycobb73----Hey! I'm the original poster on the other thread you mentioned,and I'm as interested as you to get more info.
As I mentioned before,I brought it up to the guys at practice,and they were in.We currently have a "poll" going to find out the most popular/least painful songs
We have been testing the waters since our happy misfortune,by letting a "guest appearance" happen now and then. Usually at the start of 3rd and middle of last set.
So far it's been a lot of fun for everyone. We've even found a couple people learned songs we normally play,so they could join in on back-up.
I still don't think I'd want to do an entire night of it,but it would be fun for a set!