The classic secret.
Hidden by a chair, at the back up the club is a passage to a secret VIP Lounge.
To start, go to the “unstuck me” location.

Go in the building on the top right hand corner of the screen.

Continue through the first room.

Keep going up until you reach the bar.

Stand just above the lower left hand chair.

Keep slowly moving down on the chair, you will be teleported to the VIP lounge. Don’t keep clicking down because you will just walk back out.