what should i wear?

Good evening! I received an invite to meet with the owners of a new event center that is being built here in Grove City. I am not sure if I should do business casual or really dress nice. They are allowing guest to bring in their own catering or entertainment but I want my company to be the one they suggest to people who do not have these things picked out yet. It is a beautiful center and very close so I would love a contract with them. Wish me luck. I will keep you updated! Gotta run and make some broccoli salad. Night all!