It doesn't have to be so complicated, or costly, to come up with something with family or friends.
A classic parlour game between the bath and ice cream can go a long way. Here, for just SEK 60, you can borrow a set and play croquet, kubb, and ball (anywhere on the gravel - new track planned).
All board games are available in the reception/activity centre.
Other simple forms of socializing that do not cost a fortune are bangolf, football golf, badminton and beach volleyball.
Or you can settle for a walk.
Or a bath.
Or a coffee.