One of the things you must do while you visit Prague is to go to at the very least one of their famous cafes. It gives you a real feeling what life and service was like in the late 1800's. We were there for only three days and managed to get to three of them! Since we are a bit older and don't really care to go out in the evenings (especially when our hotel is a bit out of the way), we stopped for a glass of wine and dessert in the mid-afternoons.
Probably our favorite cafe was in the elegant Hotel de Pariz. There we enjoyed a piece of their Paris Cake, baked from a 100 year-old recipe. It's on a chocolate base with a chocolate mousse filling with a slice of peach, and covered by a marzipan coating. The Art Deco design of the light fixtures, the tables, and so on is welcoming and comfortable.
We also enjoyed dessert and wine in the Art Deco and Art Nouveau cafe at the Obecni Dum (the Municipal Building - a concert hall). The stunning glass and brass light fixtures illuminate the hall with its casual marble-topped tables. Service is old-fashioned and gracious.
We were also looking for some music in this very musical city and found one cafe that offered late afternoon piano music. The Slavia Cafe is a bit out of the center, on the river, and offers piano music from about 5 PM. The pianist was terrific, although I don't know how he plays with all the noise and smoking (The Czech Republic is one of the few countries to still allow smoking in restaurants and cafes). He could tell we were really there for him and came up to us during his break to shake our hands.
If you haven't been to one of the Prague cafes, you haven't been to Prague!