Ok the first quote comes from an article 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.