'A happy worker is a productive worker' is a notion that compels many employers to laugh all the way to the bank, but chances are your workplace could stand for a little more fun. Employees like upbeat environments where things aren't taken too seriously, but from nine to five we tend to tone down our humor for fear of crossing a line or not being found funny. Humor in the workplace is not without its own guidelines, but consider the benefits a few laughs can have before leaving your funny bone in the office lobby.