Poking fun at celebs is a relatively harmless way to break the ice–and chances are you won’t tick any of your pals off, because it’s slim chances that any of them knows a celeb personally. A good rule of thumb, though? Make sure it’s someone who garners instant name recognition (think the Kardashians or Justin Bieber), otherwise your humor may get lost on people if they can’t figure out who you’re talking about.
Similarly, garnering giggles from current events–whether it’s the new mystery meat in the cafeteria or Todd Akin being a blooming idiot–will only work if people know what you’re talking about. Sometimes you’ll have to give a back story before you can tell your actual joke!