Bouncer
What you'd actually do
The job is checking IDs, watching for trouble, refusing entry to anyone too drunk or underage, breaking up arguments and getting help when needed. Staying calm, reading situations early and talking people down matters far more than being big, and good record-keeping of any incidents is part of the role.
The hours are nights, weekends and bank holidays, often in cold or rowdy conditions, and there is a real chance of facing aggression, so you must be able to keep your cool. Pay is usually hourly, often a bit above minimum wage for the unsociable hours.
By law in the UK you must hold a valid SIA (Security Industry Authority) licence, which means completing approved training and passing a background check before you can work the door. Many people start through a security firm once licensed.