Dynamic equilibrium = pub?!

A dynamic equilibrium of a reversible reaction is equivalent to:
A pub. When the pub is full, there are always the same number of people in the pub due to various fire regulations. When one leaves the pub, one person is allowed in, therefore the number of people inside is always constant (close system) and equilibrium is reached. However this is dynamic as there are people moving in and out constantly.

?!.........pub theory by allsop ?!