Pick a narrow theme
'Bangalore indie game developers' grows faster than 'tech meetup'. A clear niche makes it easy for people to know if it's for them.
Find a free space
Coworking spaces, cafes in off-peak hours, college rooms and company offices often host for free in exchange for visibility.
Use registration
Free events see more no-shows. Registration with a capacity cap and a reminder the day before helps you plan food and seating.
Same time, every time
A predictable slot (first Saturday of the month) builds habit. Consistency beats size.
Give people roles
Invite regulars to speak, co-host or run a segment. People come back to communities they help run.
Follow up
Send a short recap with photos, slides and the next date within a day or two.