ABC is dive central for University Circle. The bar itself is rather lived-in, but has great happy hour specials, a nice environment, uncharacteristically friendly bartenders, and remarkably good calamari. On weekend afternoons, this is a very nice place to get a drink and a quick bite.
The only reason why I have mixed feelings about ABC is because it's in University Circle. Droves of CWRU kids come here on weekend evenings, and it often becomes crowded, sweaty, and some inexperienced drinkers end up having miserable nights here, which directly impacts everyone else's enjoyment. I can't blame the tavern for their clientele, but evenings here end up being very hectic.