I can remember in university flyers were put up all around announcing free drinks at one of the student pubs. I paused for a moment but then realized quickly it was an April Fool prank (wondered if anybody actually did show up looking for a free drink, lol).
Several years back our local pub for April 1 had a “Free Beer Tomorrow” promotion. They printed it up in the local paper, had the local jock talk it up. If you brought your college ID you had your choice of beers.
That day the line to the pub was around the block.
Funniest thing I ever seen.