Round of drinks

I walked into the pub earlier and shouted "I'd like to buy a round of drinks for everyone!".

There were loud cheers and people were clapping me on the back in gratitude.

About half an hour later the landlord smiled "That was some gesture "before presenting bar with a bill for £826.

"Mate," I protested

Spoiler:

"I said I'd LIKE to... I never said I could actually afford it"