Hornhuset has four levels in Hornstull, on Södermalm. The ground-floor Biergarten serves beer and food at communal tables, from lunch until late. Laika, on the second floor, is a club that opens Friday to Sunday; the third floor, The Blue Oyster, is an event space for parties, company events and student celebrations, booked by email. The rooftop bar is open during the season when weather allows.

The listed hours vary by floor. Biergarten is open Monday and Tuesday 11:00–22:00, Wednesday and Thursday 11:00–01:00, Friday 11:00–03:00, Saturday 12:00–03:00 and Sunday 12:00–20:00. Laika opens Friday and Saturday 18:00–03:00, and is closed Sunday to Thursday. The rooftop bar is listed Friday and Saturday, 16:00–00:00. Visit Stockholm describes the roof terrace as a summer feature and says weekends can bring queues, so it advises arriving early.