I tread the mean streets of Balham, sometimes with headphones. I find that industrial music goes well with a jaunt around Sainsburys, eg TG (should really be shopping in Tesco but that's miles out of my way); Whitehouse in Safeways, and MB in Marks and Sparks. Still, you've got to be prepared for someone coming up behind you and mugging you on Bedford Hill, so be careful with your headphones, man.