My mom and I stopped at the Chandelier bar during the day to rest our feet and try the Verbena drink, with the 'Szechuan Button', which several people recommended. I would talk about the Chandelier Bar, but I think most people understand what it is and why it's a must see in Vegas.
The drink was similar to a margarita in taste. The waitress suggested we chew the Szechuan Button, which looks like a yellow bud, for 10 seconds on each side of your mouth and then swallow it. It almost immediately makes your mouth tingle. It seems to heighten your taste as well, the flavors in the drink were stronger and more discernable.
It was a fun, albeit pricey experience ($20 a drink).