A guy walks into a pub with his pet bat on a leash, flapping in circles around his head. He goes up to the bar and orders two pints - one for him and one for his pet bat.

The bartender thinks this is odd, but serves him. The man and his bat head to the back of the pub, get a booth, and drink their pints. Despite the bat's tiny size, it finishes the drink at the same time as the man.

The man comes back to the bar and orders two more pints. The bat is still flying around, seemingly fine. They're served and take their pints back to the booth.

This happens many times, both the man and the bat becoming increasingly drunk. By midnight they're both wrecked. The bat has passed out on the table, and the man looks like he might not be far behind.

So the man gets his coat and is about to stumble out into the night, but he's forgotten his bat, still asleep on the table.

"Hey!" shouts the bartender. "You can't leave that lying here!"

"It's a bat, not a lion!" replies the drunk man. He rolls his eyes and closes the door behind him.

I enjoy annoying people with that joke.

Thanks! :)