Blondie's pizza, the pizza-by-the-slice joint everyone coming to San Francisco at least passes by on Powell has been shut down due to "severe cockroach infestation". Now let me see... what was their best topping...Blondie's pizza, the pizza-by-the-slice joint everyone coming to San Francisco at least passes by on Powell has been shut down due to "severe cockroach infestation". Now let me see... what was their best topping...