party boat
n.— «“Party boats” are simply fishing boats that are open to the public. You pay your fare, and you’re standing next to total strangers for an afternoon, making fast friends as you try to catch your dinner. They’re also known as “open boats” or “head boats.”» —“As The Anchor Drags” by Tom Gogola Fairfield County Weekly (Conn.) Apr. 7, 2005. (source: Double-Tongued Dictionary)