I assume you meant to say illegal drug users, because there would be literally zero neighbourhoods where people are not using drugs. Alcohol, coffee, and cigare

I assume you meant to say illegal drug users, because there would be literally zero neighbourhoods where people are not using drugs. Alcohol, coffee, and cigarettes for example, which have all been illegal in some countries at points in time. There are also literally zero neighbourhoods where people are not using illegal drugs, because the truth that you don't hear about from the police and jail workers unions is that there are many high functioning productive members of society who are also illegal drug users. This might blow your mind, but not everyone who takes illegal drugs is a junky sucking dick for crack.