Drive-In 1950's

The Book of Knowledge Annual 1960.  New York:  Grolier Inc.

Pretty much all gone now.  The last drive-in theatre in Kingston, Ontario is threatened because it will cost $250,000 to buy a digital projector necessary to show the new releases.  Like many older theatres faced with such crippling costs, they're having a fund-raiser called "Go Digital or Go Dark."  According to the link:

"At their peak in 1958, there were somewhere between 4000 and 5000 drive-in theatres operating in the United States alone.  Today, according to Drive-ins.com, there are only 447 operating world-wide and of those, only 53 drive-in theatres are left in Canada."