I stayed at MGM Grand in March and I enjoyed it. We didn't spend much time in the room other than to sleep and I found the beds to be comfortable. The only complaint was a drunk lady who kept knockin on our door asking for Precious. She couldn't get it through her head that she had the wrong room.
The casino in MGM is the biggest one in Vegas if I remember correctly. For gambling we pretty much stuck to MGM and New York New York. We only played the slots and we picked a couple of machines that we liked the best and played those ones.
There are lots of free shows at every hotel/resort. Lions at MGM, Tigers at Mirage, the entire layout of New York is neat. Of course there is the water fountains at Bellagio and the volcano at Mirage. The Sirens of TI at Treasure Island. And that is just the tip of the ice berg. Though many of those may not necesarily be the party thing to do on a stag, some random guy asked me to take a picture of his group at the Bellagio watershow and they were there for a stag so I guess it depends on your group.
We didn't do any clubbin but I noticed many people were trying to hand out/sell VIP passes to the clubs. You won't have to wait in line to get those passes, but I'm not sure what the catch is to get those passes. I never bothered to find out.
There is so much to do in Vegas, just hit the websites of all the resorts and casinos to see what they have to offer.
I'm going to a Microsoft Conference in November and will be staying at Mandalay Bay. Even though I am a geek, I'm more excited about going to Vegas, the conference is just the gimmick that gets me there for free.
