Schrödinger's cat walks into a bar and doesn't.
Helium walks into a bar. The bartender says "We don't serve noble gasses in here." Helium doesn't react.
3 Database SQL walked into a NoSQL bar. A little while later they walked out because they couldn't find a table.
Silver walks up to Gold in a bar and says, "AU, get outta here!"
One day a fellow came into the bar with a cat, not just any cat, but a mean-looking ginger tom. You could see the scars from across the room. But that wasn't the weirdest thing; a six-foot ostrich - eyes like golf balls, followed them in - a real live ostrich! I asked the man what he wanted. "I'll have a pint of bitter," he said. "A pint of lager for the ostrich and a gin and tonic for the cat." The cat hissed at him. "Make that a double gin and tonic. Thanks." Well, I served the drinks, he paid, and they all knocked 'em back. Wasn't long before the ostrich came back to the bar, and made it clear that it wanted the same again. Well, I poured them. I could feel the cat's eyes burning through me as if he was checking that he got his double again. I took the drinks over to them, and the man paid, taking the cash from a purse tied around the ostrich's neck. This went on for a couple of hours. The man and the ostrich buying alternate rounds, while the cat just sat on the window shelf with his drink, looking fit to kill. The whole place got quiet. People sat and stared, and who could blame them? Eventually, I plucked up the courage to ask the fellow just what was going on. "Can't a man have a quiet drink anymore?" he rasped. So I said, "No harm meant, but you've got to admit that you're a unique set of drinkers. He smiled, but there was no light in that smile. "Okay, you want to know? I'll tell you." "I was across town the other week, working on the new road. Amid the dirt and the rubble, I turned up this old brass lamp. I rubbed it, thinking there might be a date or inscription or something. Anyway, out comes this cloud of smoke and a Genie appeared. You know - turban, scimitar, and the whole works. And he tells me I've got just one wish." "And before you ask, yes, I did wish for a long-legged bird with a tight pussy. But this wasn't what I had in mind."
Q: Why was the mole of oxygen molecules excited when he walked out of the singles bar? A: He got Avogadro's number!
Infinity mathematicians came to bar. First one ordered 1 glass of beer, second a half, third a quarter... The barman interrupted them: "Assholes, here are 2 beers!"
Q: What is worst than raining black cats and bloodhounds? A: Hailing taxi cabs!
A guy goes into a bar, orders twelve shots and starts drinking them as fast as he can. The bartender says, "Dang, why are you drinking so fast?" The guy says, "You would be drinking fast if you had what I had." The bartender says, "What do you have?" The guy says, "75 cents."
An old woman wanted to travel by bus to the pet cemetery with the remains of her cat. As she boarded the bus, she whispered to the driver, I have a dead pussy. The driver pointed to the woman in the seat behind him and said, "Sit with my wife. You two have a lot in common."