NEED GUIDANCE: Catamaran charter

[catamaran1]

Hello,

I would like some advice from the boating community. I am arranging a day event for 10 people. I would like to charter a catamaran. I would like to have an open bar, good music, snacks and fun-- I want a party cruise environment. I'd like to cruise from Miami or Ft Lauderdale to an island, stop for an hour or so and be able to go on the beach and then cruise back. I am looking for a 4 hour trip total.

Does anyone know of companies that offer this? Does anyone know how much something like this costs?

Thank you