Answered straight
How Long Should a Hat Bar Party Run?
Ninety minutes to three hours, depending on your headcount — and a defined window beats an open-ended one every single time.
Pick your window by headcount
Up to 25 guests: 90 minutes gives everyone an unhurried turn with time to spare. From 25 to 50: two hours is the sweet spot we book most. Past 50: plan on two and a half to three hours, or the last arrivals get a rushed version of the experience the first arrivals savored. These windows assume our standard two-crew setup; bigger crews compress them.
Why we talk hosts out of "just keep it open all night"
It sounds generous, but an always-open bar has no moment. Guests think "I'll go later" until later is the ride home. A posted window — "hat bar open 7 to 9" — creates gentle urgency, keeps groups moving through together, and lets the crew give the last hour the same energy as the first. Hosts who have done both never go back to open-ended.
The hidden hours: setup and teardown
Our crew arrives about an hour before open to build the station and dress the table, and teardown runs roughly 45 minutes after close. You are never billed by surprise for this — staffing at $250 per hour is quoted setup-through-teardown from the start, so the number you approve already contains the whole visit.
Coordinating with the rest of the party
Two placements work almost universally: open the bar after arrivals settle (about 45 minutes in) and close before your headline moment — cake, toasts, gift-opening — so the room is wearing its hats when the cameras come out. For multi-hour company parties, we sometimes split the window: a main session, then a short "last call" after the program ends.