Thinking about heading down to Nine Mile, TN on Saturday. Nine Mile Volunteer Fire Dept hosts four annual bluegrass festivals as fundraisers, but this year they've added a "Bluegrass Scramble" and I hope to join in.
Basically, you show up, put your name in a hat along with the instrument(s) you play. They draw names from the hat and assign you to a "band," hopefully with one bass, one banjo, one fiddle, etc. Your "band" has one hour to pick songs, practice and get ready to go on stage.
I'm only putting this out here as self-motivation so I don't chicken out.... :)