Time Out says
Known by all as 'Krolo' after the writer Miroslav Krleža who lived here, this beautiful old wooden bar near the main square gives its many patrons a flavour of pre-1991 Zagreb. The bar staff are easy-going, the inviting older clientele religiously scan the day's newspapers and the younger regulars gather round the semicircular bar. No DJs, no hipster-attracting tricks, but still crowded and raucous at weekends. Timeless is the word you're looking for.