Sad when youth choose to adopt apartheid attitudes

I asked for 2 slices of lemon, (short blond waitress about 19 - 20 years give or take) response: you must ask at the bar. I approach the only gentleman behind the bar, which unkowingly to me sais he does not work there. Barlady then responds very sarcastically and completely out of line, " I have a lot of customers waiting in the line, you have to wait in the line". Guess what no one queueing in any line. No interpersonal skills, rude and bias. I wonder if it it's because I don't share the same race as her. What other explanation does one have when the person opposite you speaks down to you, and smiles at you while serving her regular customers without making an effort to serve you 2 slices of lemon with your beverages?