Whether you're gay or straight you'll have no problem getting a massage (with a happy ending), but you'll need to get a copy of the QVegas Gay Guide or heterosexual-oriented sex guides first at one of the big, easily located adult book stores (look up in phone book). One popular ABS is within easy walking distance west of the intersection of Tropicana and Las Vegas Blvd, AKA The Strip, where the MGM Grand, New York New York, and Tropicana hotel/casinos are located and where most of the looky loos gather to sweat and dehydrate in the three-digit heat as they watch the the fountains in front of the Bellagio. If you're gay, the Entourage, at 953 East Sahara, is the main bath house/sauna place. It's a bit of a dive, but they try. It's spread over several suites of an old strip mall.
If you're interested in bi or "mixed" sexual activities, buy the local swingers magazine while your at one of the ABSs. There are several sex venues where men and women hook up for one-on-one or group gropes. You'll be welcome as long as you're nicely muscled, well groomed and are packing a X-large dick. Looking good is more more important than just being in your 20s at most sex clubs. And the majority sex-oriented venues are located a few blocks west of the Strip on the other side of I-15 -- about a $30 cab ride from your hotel (if you're staying on the Strip). The old fun places to hang out and be kinky that were down town west of Fremont Street and near Charleston are, sadly, all gone. (sniff and boo hoo) One of the most famous was the Peek-O-Rama where you could hook up for MM and MMF action when down-town suited businessmen would show up at lunch time with their secretaries or working girl for hire for a bit of strange. Milfs were regulars, too. Alas, that pit of sexual indulgence is now a distant memory.
Sometimes your masseur or masseuse will offer complimentary vouchers for the sex clubs, which I should caution are illegal in Clark and Lincoln Counties, so exact locations frequently change addresses.
Otherwise, hanging out in Vegas is a relatively vanilla experience which large families enjoy.
One good piece of advice: Stay away from local Polynesian barbecue restaurants. They've been getting regular failing grades from the local Department of Health. And avoid places that offer Spam-filled rice rolls on their sushi menus. It's a Pacific Islander thing. Native Hawaiians and folks from Samoa tend to love the stuff. However there are some killer local Vietnamese restaurants. It's hard to find a bad one.
Go soon and spend lots of money! Wahoo!