Stop in for a cup of coffee

No lunch for me. I never eat lunch. I eat a nice big breakfast, and a nice big dinner. I been this way for years. Probably, only time I'll eat lunch is if Im out with friends and someone invites me. It's a problem, cause when Im in Viet Nam, they will eat 4 or 5 times a day, albeit very small meals. And they expect me to eat also, as it is somewhat rude not to do so.....