Can I find a bull for hire in Las Vegas?

I'm taking my wife to Las Vegas for the weekend later this month, and we were thinking about trying an MMF threesome. Obviously the hardest part of the process is finding the guy. Is there somewhere we should look for a hung, good-looking guy? I've heard that there are women for hire everywhere, but didn't know if the same goes for guys. If not, are there any swingers clubs that are worth checking out?

Try a escort service? Craigs list? Just have her sit at the bar alone for awhile..

Well we would like to find someone who is guaranteed to be well-endowed and not crazy, so the bar/Craigslist idea won't fly for us. Escort service is obviously the direction we are looking, but I was kind of hoping to hear if anybody had first-hand experience/recommendations.