In 1994 the illegal gambling dens were closed and police were starting to get a hold on NYC as a whole which included Doyers Street so the clientele started to change and gentrify.
Under the area was a lot of tunnels for prohibition booze smuggling, gambling, and Shanghaiing of sailors for boats, etc. One of these tunnels can still be visited today. The entrance can be found next to Coco Fashion (by Apotheke and Nom Wah Tea Parlor) and it exits onto Chatham Square. Don't worry though, this is not a hidden tunnel, you'll actually find a bunch of small businesses.
If you visit today there is still lots of history and while most of the store fronts have changed, a lot of the builds look like they still come from the early 20th century. Here you can expect to see expensive bars, tour groups, hair salons, tourists, and people peeing on the buildings at night (welcome to New York...)
Well, that certainly makes it a very deadly 200 foot stretch of city!