I agree with Sharnita and the others who said that unfortunately, it might just cause problems or put the bartender in an awkward spot.
I do sympathize -- I'm a beer snob too, at least in what I buy for myself. Love microbreweries and local stuff, imports like Guinness, and tastes that a lot of people don't (super bitter IPAs) so my favourites are rarely offered at open bars or parties.
I don't mind cheap beer, fortunately, so I will drink that in a situation like this, but it does feel like the pricier beer is taunting me from the fridges: "I'm in here, Suri, don't you want me? I'm so dark and smooth and delicious...don't you love me anymore? I thought we were friends?"