This has always been a "must-go" kinda place for me and my friends when we're in Vegas. The one at the MGM was the original one we used to always go to but now they're almost at all the hotels it seems.
It's usually the 190 Octane or Hurricane with 2 extra shots of everclear. Does the job, especially in the summer time. If you think i look "touristy" go to hell, i'm having more fun than you anyway.