B5 — Bar and Nightlife in Downtown Reykjavík B5 is a bar and late-night venue in downtown Reykjavík. Early in the evening it works as a relaxed spot for drinks and conversation, and as the night goes on it turns into one of the busier nightlife rooms in the city centre, with music and space for larger groups. The bar serves cocktails, beer, wine and a broad selection of spirits. Guests who want their own table for the night can arrange bottle service — the current bottle menu is available on this site. B5 works for both a quiet drink and a bigger night out: after-work drinks, birthdays, stag and hen parties, work gatherings and group bookings. Tables and private areas can be booked in advance, which is the surest way to have space on a busy weekend night. For table bookings, bottle service and group reservations, get in touch using the contact details on this page.