2 weeks. I worked at Subway during 6th Form. Was alright, brought in a nice bit of pocket money. The Manageress was a cow though. I left when they wouldn't take "No way in hell am I working til 3am when I have an exam the next day. I told you at interview that I wouldn't do it, and the answer is the same now!" as an answer. They told me I'd turn in to work before 7pm or I needn't bother coming back. I popped in at 7, bought a sandwich, went home. The manager gave me an earful when she saw me leaving the shop, followed me down the road for about a hundred meters, I told her to **** off, she told me I needn't bother thinking she was going to pay me for any of the shifts I'd done because "nobody could prove I worked there". Truly enough, she tried to stick to that. I took them to court and won. She lost her job. Happy days.
That was the last Subway sandwich I ever ate.