On Monday, I'm having dinner with someone who is coming into Manhattan via the F Line and who is experiencing difficulty walking. I'd like a recommendation for a restaurant within two or three blocks at most from an F Line subway stop. I'd like the food to be good and, preferably, interesting, and almost any ethnic variety is fine. The price should range from cheap to no more than moderately expensive. Decor is unimportant, but the restaurant must be quiet enough to permit conversation without strain and uncrowded enough to permit a leisurely meal.