GCDC Bangalore is a community growth hacking group that started in May 2018 with three organizers. The group has grown to over 3,000 members and uses various social media platforms and its own website to engage members. To address issues with no-shows at meetup events, the group disabled RSVPs, puts people on a waitlist by default, sends reminders two days before events, and asks for a simple yes or no response on attendance, which has increased attendance rates.