Finally there is a "smoke friendly lounge" in McCarran International Airport! Before you get your politically correct underwear in a bundle, keep in mind, this is Vegas baby! Yeah! :)
Pony up to the bar and order a libation or two prior to boarding your flight and complying with lighted placards. Strike up a conversation with a showgirl or an Elvis impersonator while enjoying your favorite smoke. You can also try your luck with the one-armed bandits in the adjacent gaming lounge.
If your in a rush and don't have time to socialize, they also sell sandwiches and chips for hungry travelers on the go!