needle park
/ˈniːdl pɑːk/slang (originally US )
noun
A public area in a city, usually with trees, bushes, benches, etc., where drug addicts gather.
Origin
1960s. From needle + park, popularized by the novel The Panic in Needle Park by James Mills, in which Needle Park referred to a traffic island in New York at the junction of Broadway and 74th Street.