Well, i think depend what do you like. I think the mall stay in New Cairo have very bars for make cofee in good place; but I think you can enter in Al-Rehab, in the weekend the place of the food ( you enter for the door principal near the gas station, when you arrive in the circle for cars continue for the right all in line, you look one mall in the left but you continue and arrive in the other circle for cars, take the 2 exit, and arrive in the final of the street. And after in the final you started for look the KCF Restaurant. You put your car in any place and talk inside, you look a place with bars) have very people all the weekends. And well, if you like swim or make sport you can ascribe in any club near you, in Al-Rehab have too.
I don't know what is your preferences but well, you know this country and this is the way for expend time out of home, go to any bar and make a coffee or the food, go to cinema, swim, make sport.... But in my opinion in any place you can spend very good time in this country in any place