it seems i'm pretty good at it. Yay for me.
At any given store, if the PCs ask 'do you have xyz?' the salesman/woman will look directly forward and almost shout 'cannot provide you with that information, SIR'. If the question is repeated, they will go in lines of 'That information is classified, SIR. If you question me further, i will have to call the security detail', and finally - get a red phone from under the desk, and call for security, which never comes.
At night, the characters will hear toddlers screaming/crying in a house. If they investigate further, they will find a couple of young, attractive mums drinking tea and chatting. At 4am, in a house with all lights turned off, to the sound of crying toddlers coming from the stereo.
once, they will wander onto a blues club, with some tough-looking i've-seen-everything people drinking heavily, and in general being on the edge of a mental breakdown. When the party talks to them, they start going on about how the city is insane, everything is wrong, and such. They describe some situations the PCs haven't noticed, some they did. The party reassures them, and promises to be at the club next night. They will never find that place again.