I just saw a mario kart arcade somewhere on the strip (maybe gameworks). Those are suppse to be rare.
I make my time in vegas by eating at all sorts of buffets. I figure I can get 10 all you can eat meals for about $100, or I can gamble that money away in a day (and I am a mild gambler compared to some.) It isn't a bad deal.
Yeah gameworks has the mariocart, also has (what appeared to be) hand built mame style originals, the 75 foot rock wall, and all the house of the dead games (2 HOTD 4 whoo hoo) the harley cafe is a decent spot to be on a friday or saturday if the smell of rubber oil hot steel and leather is your thing.... oh yeah the eye candy is nice too. The "pirate show" is at Treasure Island, the luxor is kewl as hell for the king tut display, Red Rock is a great place to go to hike, the river is a nice way to waste a day (nude beach somewhere, dont ask never been to it). The speedway is a stylin place on the weekends (check the local papers ect) The valley of fire (if youre so inclined to rent a car) has the most beautiful landscapes in a deserti have ever seen, Death Valley is fun (bring a 4x4 and find some ghost towns) theres paintball, and go-karts and tons of places to rent anything youve ever wanted to drive (bikes, scooters, ferraris, hummers, off road buggys, jet-skis and even boat houses)
The arcade often overlooked is at Circus Circus, but i like it (silent scope need I say more?)
Strip clubs a plenty, but most are overpriced and overrated, the freemont experiance is sweet with different shows every hour.
Feeling adventurous? Rent a car, dont take out the insurance and drive.. anywhere... go out with your buddies and play "spot the hooker" its actually easier than you thought....heres a hint ... look at purse size... if it can only fit a pair of thongs and $200, chances are you can ask how much...

remember, the night-life isnt very active until at LEAST 11pm, with most places being DEAD till 1 am so get your rest.
Gambling your thing? Go for it, what casino has the best odds on slots? answer none... they're all the same (IMHO) go to freemont and play some blackjack.... poker at binions (the REAL place to play the game) on the strip play some baccarat at the monte carlo (thats living)
Best buffets... try the rio for variety, the luxor for quality (at least i think so) and the hilton for a good bargain (free beer or wine)
Music? couple of places play NOTHING but metal on the weekends (off strip) but everything is that pop stuff that your kids listen to on the strip.
The machine gun place is still around, almost every flyer display stand has info on it, its roughly $50 for 50 .... ak47, uzi, m-16, thompsons, mp 5 yeah the list goes on.... great way to take out your aggrivations after driving with no insurance on your rental that just got creamed by the mexican in the 81 gmc with no insurance.

Heres some adventure: drive Las Vegas Blvd from beginning to end, check out the jets at the airforce base taking off (by the speedway) on the northern area of the strip and drive it south till it ends (take water and lots of music -- its a long drive) drive across town on Sunset Blvd.... I assure you, it actually DOES go from one side of town to the other.... just its kinda .... interrupted. Got a date thats from out of town? Take a drive on the 215 in the evening, and find 215 and Hulapai or 215 and Alexander (the lights you see from there are amazing) Drive back from the hoover damn in the evening (spend the day at the river its worth it) and have the same effect only you wont be able to stop and look.
Heres something us "locals" apperently NEVER get tired of hearing "gee its soo hot here" when its only 100 and "how do you guys survive it" when its 120 out. I hear that every 5 minutes on the strip.... apperently the visitors LOVE annoying us locals with weather reports.... "Yes I'm fully aware its 100 at midnight, Yes I'm fully aware that it was 120 today, and NO the fact that theres no humidity does NOT make it easier to bear... 120 is STILL FEAKING OVEN HOT if you go outside"
Here's a fun way to annoy the locals... (assuming you know some) call them at 9:30 on a wed night and convince them to go out partying.... after all you're "on VACATION WOO HOO!!!" Never mind your buddy works construction, has to be up at 4 am, and knows full well the dehydration that hes still suffering from when he starts work could land him in the hospital (UMC) for a week cause of heat stroke, but he's still out there with you partying cause he hasn't seen you in years!
Yeah... I'm a local, yeah I'm a bit bitter (just got told by my buddy that hes coming out a week before his roomate -another buddy- is going to be here, this of cource is before the INLAWS come out for thanksgiving.) so I'll have a month of visitors that will think that just becuase THEY'RE on vacation I can stop my life.
BUT in all seriousness.... if anyone wants some ideas of "other things" to do Ive got a list here I can't publish... the more "adult" side of vegas if you will... and tons of stuff you can do with the family too!