I used to be in an improve group that used the setup: A (your choice here) walks into a bar. The bartender says" Hey, we don't serve ( ) here. ( ) says: Punch line. With the audience choosing the object or person. So:
A cyclist walks into a bar. The bartender says "We don't serve cyclists in this bar" The cyclist says:
But I came on a long Trek to get here.
I just can't Schwinn.
Oh, wheelie.
But I am so tired.
That's OK I can't handlebars anyway.
Wait a second let me get a grip on this.

Have you got any? How about for different setups ( A toaster walks into a bar...)
Beats 99 bottles of beer on the wall for a long trip.

That is really good.

A toaster walks into a bar.

The barman says "we don't serve toasters here"

"But I've got plenty of bread!"

"Now don't try to butter me up"

"Use your loaf man"

"Any way you slice it, I just can't serve you"

"Crumbs"

...and sitting on the bar he sees a jar full of money. he asks the bartender. "what's this?". The bartender says "in the back room we have a horse. The first one to make the horse laugh wins all this money. Cost ya $1 to try." So he puts $1 in the jar, goes into the back room, comes out a few minutes later and the horse is laughing hysterically. The guy takes his money and leaves.

A year later the guy goes back to the same bar. Again he sees a jar full of money sitting on the bar. ( oh by the way, the horse hasn't stopped laughing since ) He asks the bartender "what's this?" The bartender says "well, it's the same thing as before, only this time you gotta make the horse cry. Cost ya $1 to try." So the guy puts $1 in the jar, goes into the back room, comes out a minute later and the horse is crying his eyes out. As he takes his money and is about to leave, the bartender asks him "hey man, I gotta ask ya, what did you do?" The guy says "well, the first time I told him my (organ) is bigger than his, the second time, I showed him".

A guy walks into a bar and says "Ow, that hurts"