Here's a list I'm collecting from this, and other subreddits -
Non-"Adult" Adult activities -
Indoor skydiving - http://www.vegasindoorskydiving.com/
Boulder City has Sky Diving. (Skydivelasvegas)
jump off the Stratosphere. http://www.skyjumplasvegas.com/ (it was about $100.)
American Shooters - indoor shooting range of choice.
Fremont Street - Location for cheaper table limits than on the strip.
Ellis Island Casino and Brewery - Also small table limits, $2.00 TALL beer brewed on site
Drive bulldozers and excavators - http://www.digthisvegas.com/
Pin ball hall of fame - http://www.pinballhall.org/
quarter roulette at the El Cortez.
Helicopter tour
Zip line over Fremont
Container Park, especially at night
Red Rocks (the national park, not the casino)
Frankie's Tiki Lounge. - "very good tiki bar "
rock-climbing wall inside the sports bar Twin Peaks on the strip
Car racing open to public - Www.exoticsracing.com
“ Chicago Brewing Company on Sahara / Ft. Apache. They have great Chicago style pizza, a sports lounge upstairs and it's a microbrewery. It's one of the few places you can get ghost pepper wings if you're so inclined
Red Rock has a sizable bowling center too, 72 lanes! Link. They also have an IMAX theater"
“ Consider contacting companies like http://vipnight.com/ or http://www.clubvivalasvegas.com/default.cfm or http://www.vegaspassport.com/ or others, let them know you're coming -- and see what they can offer you."
80’s music dancing:
"Artifice on Charlston 80s nights randomsaturdays”, "spazmatics - south point showroom every saturday"
Eating: "best buffet is probably bacchanal" "Hash House - giant servings you'll never forget" Goyemon for All you can eat sushi The buffet at The M Kegs if you like dives and Stromboli, or Phillies.
Bar: dive bar is the Double Down Saloon
Beaches - "Encore Beach Club (Voted best pool party in the Country 3 years in a row or something) and Wet Republic." "If money IS an issue then head to Tao beach, DayLight, Liquid, or Sapphires." "planet hollywood two pools side by side" "mandalay giant wave pool and sand beach" “Caesars -swanky multi pool complex" "monte carlo a bit of everything" arranging dancing groups of people on meetup.com.