BA3 spreads a restaurant, four bars, a rooftop terrace, and a hidden club across three floors at Bygdøy allé 3 near Solli plass in Oslo's Frogner. The name is the address, and the format is the pitch: one building that moves from a cocktail counter to a gin bar to a club as the night runs.
The room
The ground floor holds the main bar and restaurant, a dedicated gin bar sits on the second floor, and the rooftop terrace opens when the weather allows. A smaller club room, which the bar calls The Hidden Gem, runs late on weekends. The split lets a quiet early drink and a louder late one share one address.
What to order
Order from the seasonal signature cocktails, which rotate with the menu, or move upstairs to the gin bar for a built gin and tonic. The kitchen leans modern Japanese, with sushi and warm plates that pair with the drinks rather than compete. Ask the bar which floor suits the night before committing to a table.
Who it is for
BA3 fits a date that wants options under one roof, a group that starts with cocktails and ends on a dancefloor, and a Frogner crowd after a polished room. Skip it if a small, single-room cocktail bar is the goal, since the appeal here is the range. Larger parties should book ahead on weekends.
Best time to go
Tuesday through Thursday evenings are the calm windows for the cocktail floor and the gin bar. Friday and Saturday fill from late evening, when the club room and rooftop pull the crowd. Summer evenings on the terrace go first, so reserve if the rooftop is the plan.
The bottom line
BA3 is Frogner's multi-floor cocktail address, a single building near Solli plass that runs from a gin bar to a rooftop to a late club. The draw is the range under one roof. Come early for the cocktails, climb to the gin bar, and save the rooftop for a warm night.
Keep exploring with our best cocktail bars in Oslo guide. the full Oslo bar guide. and our edit of cocktail bars worldwide. Pair BA3 with F6 Cocktailbar in Oslo, Revolver in Oslo, Himkok in Oslo.
Sources: BA3 official site (ba3.no, 2026); Visit Oslo; Yelp reviews; restaurantguru; Google Maps reviews.
