work sucks

So work sucks, I am so tired of working in the hospitality industry. I am sick of people being so high matinence. So theres this lady named Barb that is a regular at the bar i work at, and she never tips! I mean were talkin orders can after can of beer, pizzas, pretzels and never tips! She always wants something for nothing! never buys anyone a drink, when everyone else buys her a round!