No minimum. We have one here in town on the Riverwalk. I see groups come in just for the volcano and have never heard it being an issue. DH DD and I have split their big appetizer combo. It has chicken strips, southwest eggrolls, calamari and hot crab dip with tortilla chips. I think it's about $15. Lots of food for two or three. And with a volcano? Roll out of there!!!