I was on a short business trip in Chicago and had the pleasure of visiting headquarters (http://hqbeercade.com/), albeit shortly. Also, it was a Tuesday night so it was only partially open and you couldn't play all the machines
All the games, except MM, WOZ and CV seemed to be on free play and in excellent shape. I played MM a few times, 1$ per game was not cheap but it was worth it.
They had a nice selection of beers, although I was expecting even wider selection. Can't complain though.
Beercade is a fantastic idea, especially when there are many many games to play and in great working condition too. I definitely will visit the place again, next time with ample time and without a schedule.
If you have a chance to visit this place, I highly recommend it.