When I lived in Las Vegas back in the 90's I had to rely on the bus system for a few months when my car got totalled and I didn't have the cash to get another one. Actually, as long as you're not pressed for time, it's not that bad if you don't have to stand out in the mid-summer heat waiting for a bus. But we're coming up to the best weather of the year in Vegas, so that shouldn't be a problem.
The routes and schedules have been expanded significantly since I lived there. For $30 a month you can go just about anywhere in the valley. Check it out at
http://www.rtcsouthernnevada.com/cat/ -- Good luck in your poker career.