Maybe? I guess when I think of asocial vs anti-social, I think of someone who is apathetic towards social interaction vs someone who doesn't like socializing and only does it because it tends to be a mandatory part of society. As such, I'd think someone who's asocial would be indifferent to a host cancelling, while someone who's antisocial would be happy or excited by it.

Edit: I am aware that anti-social tends to have different connotations when used generally, but in a social setting I tend to think of antisocial being opposed to socializing.