Blue Man Group is highly recommended, Danny Ganz is some people's enjoyment (but not really mine) anything from the Cirque de Soleil is usually entertaining. However, many of these shows are quite expensive (Blueman was $75 per ticket 2 years ago, I don't know about now)... and sometimes it is hard to get tickets because they have all been sold to tour packages.
It's all good... it's Vegas baby...
(personally, my favorite thing in Vegas is the airport going home... but I digress...)
Hybrid Mode
