answer:I call bingo numbers and sell tickets at the hotel I work at. Bingo is a scam basically. I can’t really speak for big bingo halls, I call one game at a time for about 400 people. This is how it works my end: 300 – 400 people get in line and give me $1 to $20 each for 1 to 20 tickets. If the total sum of money is say $250, the house will keep $80, and then say that $20 is the small prize and the big one is 150. I seriously mistrust anything were money is grouped together, be it bingo or banks. If you all give you money to some guy so he can fiddle around with it before giving it back to you, they will ALWAYS take something from you, it’s the whole reason they want your cash to start with. I can’t say anything about fancy computers, I use a leaf blower and pingpong balls to call out balls painted with permanent marker, it’s hardly the lotto, but it still turns over a lot of cash.