A Scotsman, drinking in a Havana bar, saw a man with a large black beard enter. He ordered a drink, the bartender served him, he drank it, and then started to leave.

The bartender said, "Hey! Aren't you going to pay for that drink?" The man said, "Excuse me? Castro's Army!" and walked out.

A few minutes later, the Scotsman saw another man with a large black beard enter, order a drink, drink it, and start to leave. The bartender said, "Hey! Aren't you going to pay for that?"

The man said, "Excuse me? Castro's Army!" and walked out. When the Scotsman finished his drink, he started to leave and the bartender said, "Hey! Aren't you going to pay for those drinks?" The Scotsman said, "Excuse me? Castro's Army!"

The bartender looked him over. "Where's your black beard?" The quick thinking Scotsman hoisted up his kilt and said, "Secret Service!"