I saw this in a very old thread HERE. It looked like people had fun with it then, so let's try it again.

I'll start a story and then give some choices. Then someone else picks a choice and writes what happens. They give 2 or more choices for someone else to get creative with. And it goes on.

You can have a choice lead to an ending, just finish with The End. Then the next writer just goes to the previous choice and uses the unused one to carry on.

The Abandoned Prison

1.
You and your good friend Rudy are out for a drink. The bar isn't one you would normally have come to, but it has its charm. The Misfits are playing on the house speakers. Fake cobwebs are strewn all over the place. Halloween is only a few days away.

Rudy brings up the old abandoned prison. He tells you that he's heard that some strange stories are coming from people who've snuck into it. Because you two are in an adventurous mood, you decide to go there yourselves.

When you arrive, the moon is pouring light down onto the window smashed husk of the prison. The fence around the property is easy enough to get past, but how to get inside?

To try the front doors, turn to 31.
To head to the right side, turn to 43.
To head to the left side, turn to 11.
If you decide you've gotten close enough and are ready to leave, turn to 35.