3 days in around Rijeka (Zagreb)

All of a sudden My friend and I have decided to go to Rijeka this week. Adriatic Coast Sceneries are so stunning. The thread asking for some touristic useful information might be rather mediocre to the community and might be a bit late at this moment, however I am expecting any interesting tips or information about cosy palce & bars for chill-out. Although I have found only Zagreb Community that seems a bit far from Rijeka, I would highly appreciate it if you could share your favourite Rijeka region.