Unlimited Mimosas and Bloody Mary?
You will most likely not see this happen in restaurants in MA, since it is illegal to offer an unlimited amount of alcoholic beverages for one price. Only way they could do it is to set it up as a tasting, but even then, would be limited to 1/4 oz servings of bloody mary (alcoholic beverage) and 1 oz servings of mimosas (wine) - might be able to get away with a bit more if the wine portion of the drink is limited to 1 oz.. Beer can be served at a tasting 2 ozs. at a time. Private events are excluded from this, but the law is pretty specific on what constitutes a "private" event.
I haven't seen anything like this either and miss bloody mary bars dearly. (I'm a NYC native)
An idea: look into whether the Ritz-Carlton has a buffet style presentation for breakfast. At many of their other properties, they have a self-serve mimosa station (an iced bottle of champagne next to OJ). As LStaff pointed out, if there's a law against it, they may not offer it here, but worth a call.