Depends on what do you mean by your threads, though the Org currently has a bunch of places already that might serve your purposes.

The Frontroom is the primary (safe) humor hall - family-friendly area though. The Kingdom of Peace and Love always welcome friendly patrons.

The Backroom is where raunchier humor (though still worksafe and within the rules) can go. Don't worry, we don't bite. Most of the time.

The Monastery is for historical discussions. You can make your historical jokes there of course if it fits the thread.

The Mead Hall is where more creative humor (i.e. fictional accounts, funny stories you write on your own, etc.) goes.