This appears to be a snapshot, rather than an attempt at photography. The people in the photo don't look very "retro", but I wouldn't expect them too, unless this was a planned photo shoot.
Apart from a few cute guys, this shot doesn't have much going for it in the way of composition or technical merit. It's interesting (in the fact that I want to know where they're going and if they're single lol) but that's about it! Sorry!
I remember doing this type of thing when I was in college in the 70's! Once we actually fit 20 of us girls into one car. Thanks for some pleasant memories!