I love Fat Tuesdays since my first drink I had over 8 years ago. You can choice your drink (recommend pina colada, hurricane, and mudslide) and add any extra shots to it. Trust me, get the extra shots! You only live once and you are in Vegas.
Save your mug and you can pay refill prices. Also the mug is a great to keep as a token of Vegas. Another use of it is drink water while you are walking the strip and need to sober up a bit.