My Wifi password is "writtenontherouter"
And I let all my guests walk to the router and let them unsuccessfully try to use the initial password until I tell them it's literally "writtenontherouter".
I asked the bartender for the WiFi password but he told me to buy a drink first. So I ordered a Moscow Mule and asked him again. He handed me a card with the password. It said:
"Buy a drink first" ... no spaces, all lowercase."