Can a restaurant refuse to serve you because "they don't like you"?

Recently, in a bar nearby I had a short exchange with a worker at a restaurant who decided to say hello to me and remind me that she was "the nice one" at the particular restaurant I have my question about. I said, "Oh, sorry, I couldn't remember, because the rest of you all seem so mean." She laughed and walked away pleasantly. Later that evening I decided to go in to get some food. This place is mostly a pizzeria, with additional Italian food and hoagie offerings. One of the "mean" ones (possibly the owner, I have no idea) behind the counter employees told me "no, your service is no longer wanted" as I approached. I looked nonplussed. She clarified "you called all us bitches." I said, "Well, I was a little drunk, and on top of that, I think I said MEAN, not bitches." She responded, "Just get out, ," walking away into the kitchen. I replied, "Holding vendettas against people are poison for the soul." And walked out. I tried calling when I got home to have a longer conversation, but she hung up on me --- twice. Now, I've gone to law school, and I'm pretty sure based on one piece of uncorroborated evidence of derogating employees - only this one girl, the "I'm the nice one," from the bar - they can't prove I'm intimidating employees, disturbing/disrupting business or anything of the sort i.e.: being a nuisance. More, their volatile and inappropriate language towards a customer inside their own establishment caused more of the disruption. Do I still have the RIGHT to be served there as it is an open establishment, with no dress codes. I live in Philadelphia.