Never before have I ever been treated so appalling...

Never before have I ever been treated so appallingly rude by service staff in my entire life; it is days later and I am still in shock about it. I am usually a positive, forgiving person, but I can't let this experience go without at least saying something so it saves other innocent patrons from the same wrath! The young male behind the food/drink counter was not only short/rude/aggressive/cranky/angry toward me during my two drink orders, he was also that way with others in my party who arrived before/after me and ordered at the counter entirely separately (so it wasn't just "me" who seemed to rouse the inner demon in this guy). I have been to this theatre for improv a few times before and while the service staff hasn't been the greatest, this particular Saturday night has left a lasting impression on me to the point where I may never ever go back. Truly awful experience and it set a negative tone for that whole theatre experience, basically ruining half my night.