For me, I pretty much only go for duos and I would certainly recommend it, at least once.
One piece of advice, don't just go for the specific duos listed - check which girls have a duo partner on their profile. Even beyond that, don't be afraid to ask a girl you particularly like if she has a duo partner - many do, even if they don't specifically advertise it.
Enjoy
Though we are not now that strength which in old days moved earth and heaven; that which we are, we are; one equal temper of heroic hearts, made weak by time and fate, but strong in will to strive, to seek, to find, and not to yield.