keep it simple and enjoyable for the listener.
use every day facts that include nothing about those that are listening.
when expressing your laughter, always display genuine social etiquette to the observers.
and never try to explain the joke or humor to those who do not immediate laugh, then when they finally get it, they will come back an explain it to you.
the best value provided by a good sense of humor is the shorter the encounter, the better.
Remember, it is better if the joke is on you and not the listener.
Laughter is the sunshine that grows the friendship garden.