I went to pay the deposit for my wedding reception at Fountain Square Theater next August, and I was bitten by the building owner's white Jack Russell dog while leaving their business office! The bite didn't break skin, but it was painful and left a nasty bruise on my upper thigh. The owner of the building declined to offer my fiance and I a discount on our reception; as we will be spending a significant amount of money at the venue. He offered us a gift card instead....
There are no signs posted to beware of the dogs (yes, there are about 3 of them), and the owners of the building seem content to let them roam freely as strangers come in and out of their business office. I would NOT recommend going onto the second floor of the Fountain Square Theater building if you've had bad experiences with dogs in the past because your liable to be attacked!