We attended one recently which was "Bring a snack to share and a donation for the caller." It was a private social event at the home of a member of the only band in our area that does these, and they played for free as the family's annual party. Snacks overflowed the fiid table, and there was plenty for the caller. The caller, BTW, did something I have not seen-- maybe it's common, I don't get to these often--- he wore a wireless headphone mic and danced/demonstrated with us out on the floor as he called!

~Susan