I heard of the urban ranger and though it was a very good idea. I could see any number of urbanised elves/half-elves (especially if they formed a local underclass) in human cities taking to this, not to mention halflings (which could actually make that race interesting in a conventional fantasy setting, for once). Now, if combined with a steampunk setting...now, there's an interesting set of ideas. Urban rangers rappelling down Victorian smokestacks and through Dickensian slums. Oh well, maybe Eshalu's great-granddaughter.