10 startup meetups are listed in New Delhi right now, running from 3 November to 20 December. The next one is on 3 November. Organisers include Entrepreneurs Arch, Guftagu-A Circle Of Trust and Ignite Room Events.
Meetups are informal and usually recur, so if the date does not suit you the same organiser often runs another edition. Check an organiser's earlier events to see who tends to attend before you commit an evening.
New Delhi also has 25 upcoming conferences and 19 upcoming workshops, and the list refreshes as new events are added.