I was inspired by Hotel California. I wanted an inn the guests could never leave. The idea is; the inn appears one day along the road. Guests go in during the day and everything is normal. No matter the time of day, they stay until night. At that point they can't leave. The staff reveal their true nature and all hell breaks loose. They feast on patrons, have orgies, and so on. Encounters here would probably be higher level. I saw it more as a survival rather than win encounter. Survive until you can escape.