At home , I'm more or less disciplined as to what I eat; after all, I do believe in the saying: "You are what you eat and drink" . When I'm away from home, especially in another country, I am always eager to sample the local food (which usually tastes pretty good , but is not exactly the dieter's friend).
The Czechs have booths and stands placed strategically in central squares, markets, at touristic sites - selling a great variety of fast, mostly hot food which goes very well with the cold weather, and with beer.
The sausage (klobasa) is the king, and the delicious fried cheese sandwich ( smazeny syr) is the Queen of this sort of food. There are various types of sausages, and they are eaten with mustard/ketchup/sauerkraut. In the meat category, one could also choose to buy chicken shawarma topped with veggies and sauce or chicken fried cutlet.
The fried cheese (Edam cheese) which comes with mayonnaise on top and is placed in a bun, is a 'star', both on a simple food stand, and in a classy restaurant.
Sweet treats are fairly represented by waffels, dumplings filled with fruit or cream, crepe, and yeast-based pastries.
The smells in the area of the booths and stands are irresistible, and the atmosphere - cheerful. People obviously enjoy eating & drinking in the open air, especially when there's also some entertainment around.