Last weekend I gave a couple of street photography classes. One of the excercises was to walk about 1km along the pedestrianized street in Ginza, shooting only at 50mm, no more than 24-frames and no deleting. Basically 'one roll of film'. Great fun. Later we did some other stuff, with longer lenses and static positions to shoot from.
This was shot from the hip, with my lens pre-focussed to a set distance.
It was humid and it's only May. I fear the summer in this country....
Nikkor 50mm f/1.8 AiS @ f/1.8 and 1/1600th sec.