The go to place should be Rajdhani a Rajasthani cuisine restaurant where you will be delighted to see the variety of dishes and how warmly they welcome you
To any of the beautiful heritage parks when the weather is nice and pleasant! Deer Park, Lodhi Gardens etc. Also food fests like Horn OK Please or Flea Markets like Boho Bazaar. When it’s too hot, not much to do except the malls really.