The CAT Bus that provide Transportation service on the lasvegas strip are double decker buses known as The Deuce.
The Deuce stops at most major resorts and continues north to downtown and the Fremont Street Experience.
for a current list of fares visit http://www.rtcsouthernnevada.com/cat/fareinfo...
As manny as 33 of these buses run throught the Las Vegas Strip 24 hours a day.
and I think you can get a $5.00 Deuce pass for 24 hours.
That's a great deal if you ask me