A Best of Boston winner twice for its burgers, this casual gastro-pub doesn't skimp on its burger selection. R.F. O'Sullivan's menu features pages of burger choices, and these half-pound, sirloin foodie magnets can be enjoyed in more than two dozen styles. Choose from the classic cheeseburger to the Chinatown simmered in Teriyaki sauce or the radish burger doused with radish sauce. Or opt for the North Ender draped in red sauce and mozzarella or the feta and cheddar burger - and so on. And, yes, you can have crispy, hand-cut fries with that. Pints of both well-known and more esoteric brews are offered to wash it all down. The interior space has a seating-in-the-round feel; the bar is stationed in the center with tightly arranged tables and booths surrounding it.