I wasn't aware that MB had a happy hour. Not saying they didn't, just wasn't aware they did.

As far as HH in general, please check out this thread

My personal favorite is the Greenhouse. 2 for 1 drinks and reduced price appetizers. The only complaint I have heard people voice on it is that they are 2 for 1, not half priced drinks, so if your drink of choice is frozen, not real convenient. We generally both have wine, so that works out perfect!