I've worked in nightclub as a glassie and then bartender. It's a lot of fun. You meet some really cool, fun people, you see some hilarious stuff and you will meet friends you will keep for life. You will party like an animal. Cheap drinks and knock offs were awesome. Think $2 basics (spirits and beers like XXXX, Extra Dry, Cold etc) or $3 premiums (Johnnie walker Black, JD, Stella, Corona, James Squire, Knob Creek, Grey Goose, all your liqueurs). Thirty bucks and you'd be on your knees. But...
If you are studying, it's really bad. Hours aren't particularly long (around 8-10 per shift 3 days a week) but it's nightshift. Working and then finishing at 6:30am then having a lecture or tute at 10:30 or an assignment to do the next day really mucks around with your marks i.e HD to Distinction or Credit. Credit to low Pass or fail... Some unlucky people had to work until 6ish and then had an exam at 8:30am.
I'd go work in a bottleshop. Not like Dan Murphy's, but a premium bottleshop. Work with people who can teach you stuff and learn to appreciate what you are selling. Learn about wines - how they are made, malolactic fermentation, solera method, different types of oak, volatile acidity, tasting notes, history, and wine matching etc.
Learn about beers - the different types i.e varieties of ales (e.g dark, pale), stouts, lagers, wheat beers etc. Learn about how they are made and what, when and how to drink it (with).
Learn about your spirits and liqueurs...
All this stuff will bid you well in later life. You'll never buy a bad beer or wine again. Friends will love you when you get older and start having dinner parties when you can match wines or pour some amazing beers....