The night market is only open on Fridays, Saturdays and Sundays. One of the more eclectic markets I've been too. They have a wide variety of Khmer food such as frogs, snakes and tarantulas. Lots of jewelry and clothing can be found here, this a great place to walk around if you aren't wanting to spend any more. You won't get hastled here as much as most places which makes the viewing more enjoyable.