Well, don't say we didn't tell you that we were going to look at really boring ways to make money. It doesn't get much more boring that queuing for hours on end. Part of the reason that you can make money from doing really boring things is the fact that nobody else wants to do them. You can think of it as a sort of boredom economy.
This money-making opportunity comes into its own when something major is happening. The launch of a new Apple product is an obvious one, but people also queue for gig or movie tickets when something's in high demand, and not everyone can, or wants to, spare the time to go and queue in person. They'll pay you to do it instead. You can set an hourly rate for your service, or a price per job. Remember that if the queue likely involves you camping out overnight, you can charge far more for that.