I spent a little time in town today, shooting around Akihabara, under a couple of bridges and taking pics of the people with slow shutter-speeds.
I know a few good places where I can shoot whilst staying dry and getting lots of people traffic.
Playing with the speed of the shutter to get more or less blur. This was at 1/4th of a second, hand-held. Great thing about the rangefinder is that it's light and there is no mirror-slap, so you can generally - if your breathing and posture is good - shoot it right down to half a second hand-held and still get sharp shots.
Avenon 21mm f/2.8 @ f/8