^I think it might be possible to leg-shot the guy to stop them running, then Hog-Tie them, but in any event you always need the lasso.
The elegant suit is useful, as it lets you cheat in poker, but I haven't had much success with it yet. The Duster Coat doesn't do anything, but I think it's cool anyway, since it's just such a great and iconic look of the old west.