Try Ayuta in Kyungsung area. It's a relax and dark atmosphere. Indian decor and mostly contemporary Indian Music in the background. Floor seating with loads of pillows. Hookahs are 10 or 15,000won but lost quite a while. But, I think you can't order a hookah by itself. You should probably order a round of drinks too. They have a variety of beers; domestic and import, wine, and sangria. They also have indian curry with Nan or Rice. Delish and pretty spicy.

U2 in Haeundae also has hookahs, but its a bar. Depends on your mood.

I've heard of other places but not sure where they are...this is just where i've been.