I'm a big fan of Flying Monkey. The bar is beautiful. Kinda has a turn of the century look to it inside, which fits the Tremont aesthetic to a T. they also have a beautiful, large patio area so we can enjoy the summer months outdoors instead of being packed inside.
The bartenders are friendly and attentive and the owners go out of their way to make sure the customers are happy. Many bars in Cleveland I couldn't even tell you who the owners are. Amy and Mike make a point to be the familiar faces you see working every time you're there.
They have a ton of top-notch beers on tap and in bottles/cans, as well as many of the standards, like PBR. I can't say enough good things about Flying Monkey. Higly recommended!