A2B. B is a party place for the evening: Beer, Sauna, Beer, Food, Beer, Elections, Beer, Music, Beer, Dancing, Performances(?) … you get the picture …
And you get all the partying for free (almost), heavily subsidised by the hash cash.
And the usual add-ons: bag transport, runners' trail, walkers' trail, drink stops, circle, hangovers, etc.
Oh one final thing. For the first time in MANY MANY years in Stockholm: a RED DRESS RUN!!