Because it makes things small and personal -- and thereby helps to dispel Big Company Disease.
Big companies take themselves seriously. Laughter punctures the balloon and drenches things in the light of sanity.
For organizations big & small, I'd say "embrace your inner smallness".
I give a talk called "Everything I Learned I Learned in a Greek Restaurant"
People seem to like it.
Greek restaurants are the epitome of small, fast and funny.
Small and fast always beats big and slow.