Yes, they are here too! I have seen a fixie near Vysehrad today. A decent one as you can see bellow. Respect. Brakeless would probably be more hard core, but to me just riding a fixie in Prague is hard core enough. I can’t imagine myself to ride my usual trip I do on MTB on fixed gear or even brakeless. Average 8.1% climbing within Zizkov tunnel and then even more climbing of various steepness up to Zizkov tower . Then a downhill back home often fuelled by couple of beers … no thanks :)