Think you’re smart? You’ll need to be if you want to even get into People 7, a bar in the Chinese city of Shanghai where the bouncer is, well, your own intelligence.

The first thing you see when you reach the bar’s entrance is a curious set of circular lights indented in a bare, concrete wall. Two steel doors flank either side of the puzzling wall of lights – one of them a way in, the other, a trick door. I don’t want to take away all the fun, so I’m not going to tell you how to get inside – but believe me, the puzzle fun doesn’t end there. Let’s just say if you plan on using the restroom, go well before the real need arises. It might take you a while to figure out which of the many unmarked doors in the bar are bathroom stalls – as well as exactly how to enter the seemingly locked rooms with their unyielding steel doors. It’s definitely something you want to figure out before you’ve downed a few of their intellect-impairing cocktails!

People 7 is located in the French Concession at 805 Julu Lu, near Fumin Lu.