After reading the last few pages of this thread I wanted to mention a few things.
I don't understand the "napkin ration" here either. I also have learned when eating out with the kids to bring my own extra napkins.
But nobody has mentioned the napkin on the lap. Now I believe this is called a serviette (sp?). My husband calls all napkins serviettes but I read that a serviette is a larger napkin for the lap. I always eat with a napkin on my lap. Just something I was taught very early on. I have noticed here that even in posh restaurants I see few people with napkins on their lap.
Also, every year we go to my SIL for xmas or xmas eve. She sets a gorgeous table with fine china, crystal wine glasses, silver flatware, candles, flowers, etc. But not a napkin in sight!
Also not sure if this is an etiquette issue but why is it when eating at the in-laws (and I have heard this from other people as well) they serve you a plate of food as if you are at a restaurant instead of eating "family style" with the plates and bowls of food on the table to serve yourself? Is this a "food ration" thing? lol
AND don't even get me started on offering a "cuppa" to workmen! I started an entire thread on this subject several months ago when I was having my conservatory built. I offered these guys a "cuppa" three times a day and I guess it wasn't enough because they were making remarks to me everytime they would see me "better but the kettle on luv". Finally I after the first 3 days and several broken mugs later I told them I'm not their waitress. I was fed up with it. And I'm talking 7 men for 10 days straight. That was a min of 21 cups a day I was making. And they all wanted a different recipe...one sugar no milk...black with two sugars, etc. I had enough. The last few days I took the advice of some ladies on here and put a cheap kettle and cups with sugar, milk and coffee out and they never touched it. I ended up throwing the milk away. When my husband was home he didn't mind being their waiter but I thought they were taking advantage.
OK as for drinks at the table. When I first came over here we would always have Sunday dinner at my SILs. She only served wine with dinner. And I would always have to ask for something else. Not because I don't enjoy a glass of wine with my dinner but because I NEVER drink and drive..never never never..not even one glass. Now they keep diet coke in the house in case I drop by

Sorry I know some of these things aren't etiquette issues but just some things I wanted to bring up.