The Voigtländer Nokton 35/1.4 has a DoF scale on it, which you could also consider using. It's slide-rule technology to quickly set the hyperfocal distance. :) Set the aperture you're using to be under the infinity (∞) symbol and everything from the distance at the symmetric f-number to the one you're using to infinity will be focus [basically it's a fast and easy way to set hyperfocal distance]. It may be a little off for four-thirds vs. 135-format (full frame), but should be close enough for jazz so long as you're not using a very wide aperture or very near distances.
You can also scale focus by measuring or estimating the distance of your subject, and then using the scale to focus to that distance.
Most street shooters using manual lenses stop down to f/8, and then scale focus/pre-focus, rather than trying to focus on a moving subject.
There are reasons to get autofocusing native-mount lenses. :D