Regarding coffeehouses in New York catering to teenagers:

Right around 1960, some tight-assed Seattle City Council person decided (without ever having visited one) that coffeehouses were dens of drugs, sex, and (Horrors!!) folk singers! Wasted a lot of time and taxpayers' money arguing that one, and eventually came up with a city ordinance about having to be eighteen to enter a coffeehouse.

I recall lots of curious and eager noses pressed against the front windows of various coffeehouses (those that had windows). But I don't think any of the coffeehouse owners ever carded the patrons, even the very young-looking ones.

Don Firth