Boat Tour/Charter with Alcohol for 3 People

Hi! As the title says, my friends and I (22F/23F/23F) are wanting to go on a catamaran style (like island beach, small to medium boat, possibly snorkeling) where alcohol is either allowed or included. We're not trying to get trashed, just have a few drinks and relax. We haven't been able to find anything that's not like a 12 person private charter that costs thousands of dollars. I was wondering if anyone has found anything like this in the past and would be able to give us a recommendation. Additional info, we're fine with it not being private, preferably leaving from Naha or Chatan, preferably during the day, longer duration is better.

by Different_Pride_1080