I am in Delhi from a week now and 2 of my friends are coming from Kathmandu to give me a short visit for 2 days, they want to go city tour and want me to act as a city guide for them. I have some ideas of where to go in and around the city, but still need more opinions and suggestions. We all are in our 30's and not in aggressive parties so we need something calm and worth visiting. All travel will be done by auto-rickshaw and Delhi metro train and we do not want to go out of the city. Please suggest the best things which we can do.