You should check out The Rose Cafe, BAE The Bistro (Kalkaji) and BYD (Dwarka) as this one has a rooftop seating area.
Beliram Degchiwala Lajpat Nagar
Check out the social noida in DLF mall of India, it's newly opened so there isn't much crowd and the place is just lovely that gives a retro 80's-90's with live screening of songs and movies on the projector. Definitely check this out if you haven't.
The Rose cafe champa gali