This review is strictly for the Bier Markt because even though they're connected I consider Bar Centro an entirely different place for an entirely different occasion.
I love Bier Markt. It is probably my favorite bar in Cleveland (I've been to em all). They have plenty of tasty craft beers and all of the staples. The place is spacious and the crowds are usually all easy going people who are just having a good time so even when it is crowded there is not a whole lot of the "come at me bro" contingent. I will say one thing we have noticed and talked about with the Markt is that the crowd can be entirely different from one night to the next. One night you can have artsy horned rim glasses type, the next you can stumble upon 5 or 6 routy bachelorette parties. It's just a great place. Also, as a newly single person in my 30's it is a great place to meet new people without having to wade through the "hey brah" "Erie shore" crowd on West 6th.
If you haven't been there you should give it a try, and while you're there you should get a pizza from nearby bar centro. It will change your life :)