Yup, that's exactly the sort of thing I was thinking. Having a narrow focus means friends know exactly what they're going to get out of the evening, which make

Yup, that's exactly the sort of thing I was thinking. Having a narrow focus means friends know exactly what they're going to get out of the evening, which makes it easier for them to decide whether to attend or not. Same goes for me too, if a friend invites me over for board games, great, I'm up for that. If a friend invites me over for a general hang out, that could mean the even goes in any number of directions, some of which I'd be less interested in (e.g. heavy drinking, watching sports), so I'd be less likely to attend.