In the afternoon, I drove through Andres Ganj and Sadiq Nagar and walked through some of it too. On the way back from the AG Safal store through AG, on the right is a large garden/park along what looks like some college (red brick kind of). I think this is behind the Ansal Plaza. It said Hudco Udyan in several places.
I seem to have gone broadly through all areas, colonies and markets. It's impossible to do a detailed search since there are too many lanes criss-crossing, too many bastis/slums etc.