You get a few strange looks from the crowd in the bar as you open the door. It is at least a foot thick and its edges are rubber. You hear a soft hissing sound as you close it behind you.

YOU ARE IN THE AIR-LOCK.

The air-lock is a small square non-descript room with gray walls. There are vents along the floor and a florescent light in the middle of the ceiling.

There is a door on the opposite side of the room surrounded by red lights. There is a lot of red writing on the door, but it's in a language you don't recognize. The door handle is a huge metal lever that as long as the door is wide. Something about the door says "employees only" without actually saying it.

Open the door.
Go back to the bar.