By far the best thing to do in Vegas on a Sunday is be at rehab. This and Tao is by far the two best pool parties. However rehab is bigger (a lot of pools, outside gambling, and just a lot of space) and dare I say the better dj and overall theatrics. Drinks are really high here, food is really really good here (especially the nachos), and I promise you this, you will not leave here disappointed and you will have a great time, and this is a place you will never forget.