As kt wrote, yes soft drinks are included. At Bellagio you can pay extra for all you want of certain alcoholic beverages. I apologize for not remembering the details. There was a menu on the table listing the choices and the additional cost.

$11.99 extra for free beer,wine and champagne at PH....free alcohol included at Mandalay Bay,Palms and M Resort...not sure on the others.

I asked and got milk at a buffet once.

I asked and got milk at a buffet once.

FYI Caesars has a champagne brunch on the weekends

The Bellagio buffet has an additional $10 charge for all-you-can drink alcoholic drinks. But be careful about which drink you choose. I was under the assumption that you could freely choose any of the drinks listed on the all-you-can-drink menu. Not so. I chose the bloody Mary and it was freaking nasty so I switched to a beer and they didn't want to do it. It took the shift manager to okay the switch. So be sure you are going to like what you pick because you are locked in at that point.

I recommend checking out the "Studio B" Buffet at the M Resort if possible. Go in at lunch and it's only $17 and it includes 3 different types of wine and 4 different beers on tap. You could easily buy the buffet just for the drinks and get tanked.

There are a few Groupons (and possibly Living Social) deals out there that include alcohol. We bought the Spice Market Buffet (PH) & Cravings (Mirage) for our upcoming trip. Both include all you can drink beer or wine.

At Spice Market (using the groupon with the beer and wine) the server brought bottles of wine and left them on the table!

We went to the lunch buffet at the Palms and unlimited house red and white wine and beer are included in your buffet price.