One of the Gothenburg rooms is about exactly what you are celebrating. In Hotel Shakespeare you wake up in a hotel room after a wild bachelor or bachelorette party. The wedding ring is locked in the safe, but the code was changed during the night, and you have an hour to work out what happened. It is a comedy, not a horror room: rated Medium/Hard, for ages 18 and over and for two to five players.
Bigger parties split across several rooms. The Detectives, The Chapel and The Casino Heist also take up to five players each, so up to 20 people can begin together whenever the calendar has the same start time free in the rooms. Give Hotel Shakespeare to the team of the person you are celebrating.
A sample day: start with a sauna and a cold dip in Frihamnen, where the public sauna in Jubileumsparken has to be booked. Play in the afternoon, then have dinner in Majorna or Linnéstaden. Prefer a day on the water? Tram 11 runs straight between Saltholmen and Mariaplan, and from Saltholmen ferries sail to the car-free islands of the southern archipelago.