The one I go to is 1/2 manned... They have a pre-spray station, then a guy pre-sprays the pass side and rear, another guy loads you on the conveyor belt and sprays your grille and pass side, then you go through the auto wash, at the end they have young college age guys (and sometimes a girl) hand drying the cars (tipping optional).
They have a manned interior/detail shop around the side where they vacuum the carpets, wipe the dash and steam clean the door jams, and windows for extra charge.
A different outlet of the same station has an area after the hand dry where you can vacuum your car yourself at no charge (I think). And they also have a manned interior/detail shop like the first place where they do it for you (at a nominal fee).