is basically a water bong in which you smoke flavored tobbacco out of. Its a Persian cultural thing. Its what Caterpillar from Alice's Adventures in Wonderland is smoking.
Aah but the only relevance it has is that the place is chill and relaxed. Sorry to bring something that some people might not appreciate to these boards (especially being new here) but the more you know! Especially since i'd imagine a lot of people here are health concious and smoking isn't healthy. But uhh ... I saw that thread on smoking Green Tea so this could be a healthier way to do that - if your into that sort of thing.