At the self-serve coffee station on the ferry to Pelee Island, Ontario, they had Dad jokes posted on the coffee machines where you had to lift the flap on a sticky note to get the punchline:
Why did the
coffee file a police report? Because it was mugged!!!!
I know, I know, a little painful, especially if you haven't had your first coffee, but I watched everyone in line flip the note for the punchlines and then smile or even laugh at the groany-ness (it's a word) of the jokes. And it generated a conversation amongst the passengers in line!