Never try to be funny. Either you are and you know it. Or you’re not. When facing an audience, that’s not the time to experiment.
If you know (for sure) that you can make audiences laugh; by all means use your talent to draw your audience in. But if you’re not a natural comedian, then don’t risk scaring your audience off with bad timing, poor punch lines, or your own nervous giggles when silence follows your joke.
Google offers up nearly 3.5 million sites and gurus discussing the advantage of humour in presentations. There are probably ten times more presenters who will confirm that those wisdoms never worked for them. And ten times that of audience members who have suffered at the hands of such nonsense.
There are so many better ways to connect with people. Please, don’t do it.