Where do locals actually go in Reykjavik?

The real social infrastructure in Reykjavik is the sundlaug, the geothermal swimming pool. Sundhöllin on Barónsstígur (entry 1,100 ISK, roughly $9 USD) is the downtown pick among regulars. The hot pots run 38-44°C, and the etiquette is firm. Shower naked before entering, no exceptions. Weekday mornings between 6:30 and 8:00 draw the same faces who have sat in the same pot corner for years. You'll hear low Icelandic conversation over sulfur-tinged steam, and someone might nod you in after your third or fourth visit. Laugardalslaug in Laugardalur is bigger, with seven hot pots, a 50m lap pool, and a steam cave carved into fake rock. It fills with families after 16:00 on weekdays. These neighborhood pools cost a tenth of the Blue Lagoon's entry fee and give you a social anchor that no cafe in this city can match for a multi-week stay.

Grandi, the old harbor district along Grandagarður, is where Reykjavik's under-40 crowd has settled. Grandi Mathöll food hall (open 11:00-21:00) serves lamb soup and fish and chips using haddock the trawlers offload 200 meters away, with mains from 2,200-3,500 ISK. Marshall House at Grandagarður 20 holds two art galleries and a top-floor restaurant, but the ground-floor cafe is where local designers and film people camp with laptops between 10:00 and 14:00. The wind off Faxaflói bay hits hard here, even in summer when the air sits around 11-13°C and carries salt and diesel from the fishing boats. For groceries within walking distance, Krónan at Fiskislóð 1 stays open until 23:00, which matters when your nearest Bónus closes at 18:30.

Reykjavik's drinking culture revolves around happy hour because nobody pays full price willingly. A standard beer runs 1,500-1,800 ISK ($12-15 USD). The afternoon discount window drops that to 800-1,000 ISK. Kaffibarinn on Bergstaðastræti 1 (the bar with the London Underground logo on its facade) fills with music-industry locals Thursday through Saturday after midnight, but weeknights it's quieter and better for conversation. Kaldi Bar on Laugavegur 20b pours Icelandic microbrews from Kaldi Brewery in the north. The crowd tends to be late-20s to 40s, more local than the tourist bars near Austurstræti. Friday and Saturday nights on Laugavegur get loud after 1:00 AM. The locals call it rúntur, the round-tour pub crawl. If you want to meet people, show up at 23:00. If you want sleep, stick to Thursday.

Skip any restaurant on Laugavegur between Bankastræti and Hlemmur with a menu in more than three languages. Locals eat at Noodle Station on Laugavegur 103 (beef or vegetable noodle soup, around 1,990 ISK), Bæjarins Beztu pylsur hot dog stand at Tryggvagata 1 (one lamb-pork pylsur with everything for 590 ISK), and the occasional splurge at Grillið in Hótel Saga on Hagatorg (tasting menu from roughly 18,000 ISK). For weekly groceries, Bónus on Laugavegur 59 is cheapest but closes at 18:30 weekdays. Krónan stocks a wider selection of skyr and Icelandic dairy and stays open later. Vesturbær, the residential district west of Tjörnin lake, is where longer-stay visitors should look for housing. It's a 10-minute walk to downtown, has its own pool at Vesturbæjarlaug, and Deig Workshop on Tryggvagata sells sourdough for 200 ISK less than the Sandholt bakery tourists line up outside.