Ok the first quote comes from an articlearticle linked, near the end of page 6 of the document.
"turned-on" in this case mean getting high from using drugs.
I think the implication about New York city is that neighbors can look out their window and see into the kitchen of others. If the folks got stoned, then the kitchen would be a mess. I think the implication in all of this is also that the drug is marijuana which presumably gives users an appetite.
The reference to a "small kitchen" I think means in part that everything was visible. It wasn't a big kitchen which would have a lot of nooks and crannies that wouldn't be visible by a casual view through a kitchen window. The sentence on a whole also implies that the speaker's kitchen was often messy, because of drug use, and visible to the neighbors.