I don't see what so hard to understand.
Imagine person A who owns a club, person B who is a gig organizer, and bands X,Y and Z.
1. If you were person A. Would you allow a bunch of no name bands to play in your club with no guarantee that they will bring a drinking crowd in? Logically, no.
2. If you were person B. Would you organize a gig if you had no cash and no club? Logically, no.
3. If you were band X, who is confident in your music, and wants to showcase it. You approach person A and ask if you could borrow his club for your band to play in. He says, "Okay, the rent for the night is $900." Your band decides that's a fair enough rent to book THE WHOLE CLUB for THE WHOLE NIGHT. So you call in band Y and Z to split the costs.
You work out that if all 3 bands sell 30 tickets each for $10, you'll have enough cash to pay for the rent.
You ask your friends to come support. You get your family members to come support. You go on the street with fliers asking people to come listen to your band.
And you play a great gig.
So now, instead of you having to approach the club owner and negotiating terms and finding other bands, and calculating the costs, and printing your own tickets, and doing promotions, person B is doing it for you.
And you're complaining?
Do some work, promote your band and your music. It'll pay off. 30 isn't much, ask a 300 people from your school and maybe you'll have 30 come. That's how some insurance people make more than $5k a month. They approach everybody.
http://www.youtube.com/watch?v=yWsZi4pokIU