Time Out says
In the heart of historic Rab town, black-and-white views of which are framed and mounted around the interior, the Caffe Biser is the classic place to start the day. The coffee, of course, is top-notch, and there’s also a terrace garlanded with brightly coloured flowers where you can relax and peruse the daily papers also usefully provided. Many pass by during the day for the other stand-out feature of the café: its range of ice cream. Late opening also means you can enjoy a nightcap here after dinner.