Right, maybe I should get in the habit of using napkins now anyway because I just remembered used napkins can be recycled as organic material. I will give her a nice tip for being considerate.
If the waitress brings you a lot of napkins (especially without asking first), ...you might be a slob. If they always seat you at a table with a janitor,... you might be a slob. If they seat you at a place where the table, chairs and floor are completely covered with large black plastic trash bags,... you might be a slob.
No, it is probably some kind of waitress initiation test. Like: 'Take this to that shabbily dressed mean-looking guy over there, and if he resents you making him out to be a slob, just show you can give as good as you get and you're in'.