Apparently in your state you have a case based on the Pennsylvania Dram Shop Law.
Pennsylvania Dram Shop Law : Pennsylvania Law Monitor
Read the article then call a lawyer tomorrow morning. That will be the day before Christmas Eve so get moving.
I'm not an attorney. Years ago my family owned a bar for about 15 years in another state which also had a Dram Law. A regular patron had been in the bar before being killed by train at a railroad crossing. The deceased was declared legally intoxicated by the M.E. His wife sued the bar's owner and the case went to court.
Under the Dram Shop Law, the bar had responsibility as he had been served a drink. The long time regular didn't speak when he sat on a bar stool. The bar was busy when he caught the bartender's eye he held up one finger, the index finger signaling for one drink as was his custom. The bartender poured the man's regular drink and marked it on a coaster in front of the man "running a tab". When he signaled for a second drink the bartender spoke with him and cut him off at one drink when the man replied with slurred speech. The bartender suggested he sleep it off in his car and asked for the man's keys to prevent him from driving. He also offered to call a cab. The man mumbled inaudibly and left.
The court found under the Dram Shop Law the bar had responsibility. However in this case there was an overriding exculpatory factor. An investigation found the deceased had tried to commit suicide several times before. The driver of the car behind the deceased testified at the scene and in court that the deceased had driven around the railroad crossing gates and stopped on the tracks. The railroad engineer testified that he blew his whistle several times and he could see that the deceased made no effort to drive off the tracks nor exit the car. Instead he sat and watched the train run him down.
The court found it was a willful suicide.
The bar was sold within a month due to the Dram Shop Law exposure.
You have two situations:
They have culpability under the PA Law for serving an intoxicated person.
Their bouncer can defend himself from an attacking person but he doesn't get a free ride on battery. If the police "threw out a drunk" who ended up in the hospital with head injuries the city would be expecting a lawsuit.
Get all the info together, bar receipts, witnesses, bills, etc and go see an attorney.
And stop posting about this on an Internet board with your city identified and your photo present. Even if the other side doesn't see this your employer might.