When I had my first stint as a manager (way too young to be one IMO) I learned quickly that jokes from manager guy had to be VERY innocuous. Puns are fun, but nothing about work that someone might be sensitive to. Keep the jokes themselves postive-ish. Know the room very well before you tread anywhere else.

It's just way too easy to send the wrong message.

As a manager your words have a great deal of WEIGHT regardless of your intention.