Well...I'm not sure how much help I'll be, being that I'm a girl, I can't really suggest the best "stag" night for you. Though, I can help you with some of the
Top Things To Do in Las Vegas.
If you're in for a bit of a thrill ride, check out the Big Shot at the
Stratosphere. You can also take in the sights at Lake Mead, or Red Rocks. If you and your friends are into cars, the Imperial Palace has one of the largest auto collections.
As far as Night Clubs go, Destination360 has a
list of the popular clubs . Vegas Ed, may have a better insight on what night is better for what club. Though, a trip to the Playboy Club is sure to please everyone. Then there's always
TAO located in the Ventian, where Pam Anderson and Usher both rang in the new year.
I hope this helps....