Interesting to think this is the UN neighborhood now.
The IMDB trivia gives the location of the neighborhood inspiring the story. Plugging that into google you see it's now only a couple blocks north of UN Plaza. High rent turf today but considering the realities of the UN, it was probably a classier crowd with Baby Face and the Bowery Boys.
As for the shootout, Thomas Jackson did pretty good. First he takes out Edward G Robinson in Little Caesar, and six years later he nails Bogie in this film. I don't think any other movie lawman matched that.