Let's see, fun from the last trip to Vegas was MGM's poker room (very nice) - $70 or $80 tournament 7PM weeknights except friday. Logged 20+ hours in 4 days there.
The copter ride to the Canyon can be a decent deal, especially if you have never been on a copter ride before. The novelty alone is good for ya.
Hobby wise, well, fuggedaboutit. Prostitution is illegal in Clark County (where Vegas is located), so all those girl to your room things are expensive scams that will not make you happy. Massage is pointless and just about as illegal. Only fun it taking a limo to places like Sherry's Ranch in Pahrump (free limo ride) but you could spend hundreds or even thousands for what you wouldn't drop $200 on in the GTA.
Strip clubs are getting interesting in Vegas. First and foremost, they are desperate. Vegas has gone from hotspot to relative ghost town in a short period of time. I checked out Cheetahs, which use to be crowded AND uptight about content. It was fairly quiet and the girls were encouraging very explicit contact in their non-vip dancing areas. I also checked out Olympic Gardens (across from the Stratosphere) and was offered just this side of a full menu if I went into the $200+ VIP room. Main floor action including some impressively wet digital fun. Check out the asian girls, they are pretty naughty. All of this of course is without any changes in the law, which suggests either LE is not looking, or everyone just wants the money and doesn't give a crap about the boys in blue.
Good luck - I am planning another run within a few weeks, the last minute deals at this point are insane.