Positive language sign at my gym

The signage in my gym is a stand-alone exercise in positive semantics. It is unfailingly upbeat and optimistic. I keep hoping that some if it will rub off on me; that, along with the endorphin rush after my work-out, it will imbue me with at least a temporary sunnier disposition.

I’m afraid it does the opposite, but I have been wondering if I should try giving the No signs in my field guide the positive semantic treatment.