Most of the time, this kind of joke start with a "X walks into a bar...", where X can be a a single person,a animal,or a group of persons.
X can also be classified in different kind :
religious : a Muslim, a Rabin and a catholic
racist :a Indian, a black man, a Asian.
xenophobe :a german, british, american, irish, italian.
dirt joke (not for kids) :a gay, a parrot(*).
zoo :a kangaroo, a penguin, a bear, a elephant (see joke 1)
(*) there is a 99% chance that a joke that involve a parrot in a bar is a for-adults-only joke.
A kangaroo walks into a bar and orders a martini, drinks it and pulls out a five dollar bill to pay for it. The bartender picks up the dough, gives him his change...and charges the kangaroo $1.50 for the martini.
“Then as the kangaroo’s leaving, the bartender tells me he’s never seen a kangaroo in his bar before.
“No,” says the kangaroo, “and at these prices you never will again!”
2)Bar Joke 2:
Ham sandwich walks into a bar and orders a drink. Bartender refuses: “Sorry, we don’t serve food here.”
3)Bar Joke 3:
A neutron walks into a bar and orders a beer. The bartender sets the beer down and says, "For you, no charge!"