How old are you? The service industry is notorious for its rampant drug use. Literally, about 4 out of 5 restaurant workers either smoke cigarettes, do drugs, or are drinkers to the point it's problematic. I remember co-workers observing how working in the restaurant brings out alcoholism in people, which is true. Working in restaurants is literally a party, both off of work and sometimes even on the job (which I never did, but people did work drunk).