Omiai? I haven't been on it but "gokon",which is more casual than omiai for a few times. I regarded omiai as the traditional date for marriage,or the meeting for a person who isn't a favorite with women/men. But,recently these seem to be almost same.
I read the similar topic on "Metropolis".I'm surprised that romance is becoming big business in Japan. Now,as you know,people seem to be eager to have a place of rest and relaxation,home.
Gokon may be a reasonable and useful way to find a partner or a soul mate of the temporary relation for a person having no time to get it.But it is somewhat unnatural to me.