A visit to Dr. Fish will cure you of nothing, that I am sure of. But it does make for an entertaining way to spend 20 minutes. The feeling of 100 fish nibbling on your toes is kind of neat too. Just don't think of how much human skin is floating in the tank you're stepping into, and you're golden.
Dr. Fish booths like this can be found all over Asia - there had to have been two on every corner in the town I lived in in South Korea. What sets this Siem Reap booth apart from all the others is the level of service; not only were guests able to relax in big leather recliners, they were served fruity cocktails and slices of pizza. True story.
Setting an appointment with Dr. Fish is almost so silly that you have to do it. Mix things up and order sardines on your pizza. I dare you.