Where can I spend a full day of visiting places (please avoid monuments unless if it's really special) and having interesting food in Delhi with a friend who's visiting delhi for the first time?
Seven wonders at night looks to pretty. And you should definitely head to Sarai Kale Khan for the same. Otherwise you can take your friend to jail road for some good food that too very reasonable.
What's better than exploring the streets of old Delhi, as you will actually get to know the history of delhi and will get a chance to taste the lip smacking dishes!