Wifi password

Customer: What’s the wifi password?
Barkeeper: You need to buy a drink first.
Customer: Okay, I’ll have a Coke.
Barkeeper: Is Pepsi okay?
Customer: Sure. How much is that?
Barkeeper: $3.
Customer: There you go. So what’s the wifi password?
Barkeeper: You need to buy a drink first. No spaces, all lowercase.