These Jokes are best suited to People who Drink because they'll understand Most of the Jokes when not Drunk.
A guy walks in a bar, and buys a huge beer. Then he sees someone he knows, and decides to go and say hi to them, but he does not want to drag his beer mug with him.
So he sets it on a table, along with a note "I spit in this beer" hoping that none will steal it then.
Upon return, he sees another note saying "Me too!"