I was impressed by Bareburger's selection of different meats. I had the Grindhouse and the elk had subtle differences to beef burgers. The brioche bun was pretty good too. I definitely want to go back and try the boar and bison. Though it's cool to try different game meats, it's extra hard to taste them with all the toppings (i.e. are you sure it's not beef?). Still delicious though.
However, if you go you should stick to the burgers. I had a Tom Collins cocktail and it was pretty disappointing (super watery, very little alcohol, and quite expensive for a place like this...$13). They had half-off cocktails that day but the waitress didn't tell me that the one I picked wasn't part of the promo, despite being on the same part of the menu and having JUST talked about the promo. Found out when I got the bill, which made the substandard drink even more disappointing. Go for the burgers.