No elbows on the table. Chew with your mouth closed. Place a napkin on your lap after being seated.
Basic table dining etiquette is ingrained into us from a young age, unfortunately mom and dad didn't teach us about coffee house etiquette. Is it the same as dining etiquette?
Is it rude to ask what a drink is if I don't understand? How much do I tip? Do I just leave my ceramic mug on the table after I am finished?