Was at Abt today, but not to charge up. Just had a day off, wanted to drive the Y somewhere, and that's where I ended up. Every time I visit Abt, the company has done about another dozen interior remodels. Absolutely a sort of Disney Land for electronics and appliance shopping. Middle of the afternoon, it was so busy, I had to park three blocks south of the main building. I was wondering why I saw so many Teslas parked and driving around. Upon leaving and walking towards my car, that's when I saw them, their Urban Superchargers. There was car charging at Abt years ago, and the non-Tesla chargers are still there in front of the main entrance. I was pleasantly surprised they had ante'd up to this level. They were half full. I was still at 60%, so I decided to charge back up at home, and not knowing if these were free or priced per kWh. Reading this thread, I'll know for the next time I need charging when I'm in the area.
Oh, BTW, the official Tesla map is incorrect placing these chargers at the north end of Abt's property. They are on the south side, next to Milwaukee Road.