At Mt. Rose Ski Area there is a sign at the entrance listing some rules forbidding bringing in alcoholic beverages, etc. The sign says, ROSE NO'S and then lists what is forbidden. I say there should be no apostrophe between the O and the S as that makes NOS possesive which, of course, is an absurdity. I say that NOS should be enclosed in quotation marks indicating that it is understood that it is not strictly proper but, rather, is being used in a fanciful way. The sign should read like this:

ROSE "NOS":

NO ALCOHOL BROUGHT IN, BLA, BLA,BLA

ETC, ETC

Am I right?
Hello Powderdog.

Your grammar is impeccable, but your sense of presentation suffers. 'NOS' in all caps is all but impossible to interpret. In your defense, however, the whole sign is difficult to interpret, and someone should get off his lazy butt and write it clearly and completely:

PROHIBITED AT MT. ROSE SKI AREA

My guess is they think the word 'no' as a noun, thus 'Rose no's'