Trzesniewski ★ 4.7
Trzesniewski on Dorotheergasse in Vienna has run since 1902, the 21-Aufstrich open-faced sandwiches at around €1.50 each the centre's cheapest sit-down snack.
Try: Three open-faced rye sandwiches and a Pfiff beer
Tip: Order at least three; the egg-and-bacon Aufstrich is the regular's pick.