Yeah Svijany, thats a quality beer. They had it in my local until it sadly got new management in and now its just Staro Brno an awful beer that people in Brno even call Staro Hovno. Good that you've been out of the tourist centre to Zizkov, I lived there for about 2 years its the heart of the city, although Vinohrady is a bit smarter. Used to be a tiny bar in Zizkov called Bar 21 where I lived a short stagger from, only could fit about 10 people in there but thats my favourite ever bar. Now sadly a laundrette for the students halls over the road.
Are you in Brno? Almost went there once - bit of a motor racing town too. I recall people saying that Staro Brno is classed as Staropramen is, as being a bit second class. Though bottles of Staropramen from my local Morrisons knocks spots off most other UK lagers.
Always get out of the centre (we stay in Mala Strana), and get to proper, locals' pivnice. Zizkov has a few dozen good pubs, U Sadu (next to tower) is my favourite as thet have a good selection of quality beers and good food. Other favourites in Prague are Pirvni Pivni Tramway, U Kocoura, U Cerneho Vola, U Medvidku among others. Have also done a number of trips out of Prague, as the Czech trains are very cheap, uncrowded and civilised. Can't wait 'til November.
Apologies to OP and others for rambling on about Prague.