What a great selection of drinks! There was also a nice view and lots of televisions to watch sports. The service was excellent and it was a nice bar in the atrium of the Hyatt Regency.

The only complaint is they are not very good at making martini's. But otherwise it is a pretty cool place to start off your night in Chicago.

Can't even hear yourself think in this place, let alone talk. Not a place to enjoy a drink or a conversation.

The happy hour doesn't include cocktails, just wine and beer. During the summers, it got hot in the afternoon and pretty crowded. It has a nice view of the city though.

It’s just a bar, nothing more, but conveniently located just inside the entrance. Not exciting, nothing cool about it but a great gathering place for those at a conference.

Ignored whilst at the bar for 15 minutes. Lazy bar tenders. Used glasses left on the bar. I’m amazed that this is acceptable. When I asked the bar back where the bar tender was his reply was ‘over there’. Good job!!!

Stopped at Big Bar twice during my conference. The atmosphere was low key yet buzzing, the drinks were generous, and the bartender entertaining.

Great drinks and nice atmosphere, but you really pay for the privilege. Bartenders can make anything you can dream up. Lots of big screens to watch local sports (since you can't in your room).

Couple of night there and you will enjoy the very best of Hyatt. Anything better than having a drink with your colleagues

We have been twice here during our Chicago-trip. I guess there is no whiskey or wodka someone would miss... Enjoy the thursday-parties!

The food was good and the drink were good also. Our server was very nice and on point with service. We would definitely return to this bar and hotel.

In a large atrium space open to the lobby below, this is a great bar with lots of room and an attentive staff. Terrific view of the Streeterville skyline to the north.