It's actually a good comparison.

Because if a club had a prominently posted rule "no shit on the soles of your shoe", I would not be asking "Well, how much shit is on the soles of my shoe?"

I would be asking, "How likely is it, that I'm going to get a couple drinks in me, and then get cornered by frowning men who need to inspect my shoe soles for shit traces? How would I feel after passing the no-shit-on-shoes challenge?"

Then I would find another club.