I'm aware of at least one coffee shop that become the trendy place for high school students to hang out. The place wasn't that big and became crowded every Friday and Saturday night, full of rowdy teenagers running around (those damn hormones
) It was so packed that most people stopped buying coffee there since there was nowhere to sit and drink it.
Unlike the original poster, most spent hours in the shop without purchasing coffee. They eventually had to hire police officers to stand by the door and the moment you finished your coffee you either had to get in line to buy another cup or free up the table for other people. After a summer of that, the kids found someplace else to hang out (they always do....) and the regular paying customers returned.