More detailed:
Concerts: - 20-40 age - concerts as interest - > 2-3 concerts per year - male & female - big cities - music lovers - following famous musicians - Spotify/iTunes account - who are missing interesting concerts - who like local outgoings - earn good money - vote for music charts - single - artists - Tech Enthusiasts - students
Parties: - 18-30 age - night life lovers - single - big cities - male & female - music lovers - social media users - students - Tinder users - Friday and Saturday are out - networking - extroverts/ social - travel/tourists
Sport: - male - 18-45 - read sport articles - read sport websites - watch sport on TV - part of sport communities (social network, fan clubs) - in relationship/married - cities - who are former or current athlete - Livescore, etc. users - Betting lovers - ESPN/NFL/NBA Pass - DAZN app user - tourist - students
Theater: - 30-65 - high education - top earners - part of cultural groups - politics/actual news - society activists (NGOs, Foundations, etc.) - in relationship/married - male & female - high social status - artists
Tech Enthusiasts: - people who like to test new stuff
Perform cheap/reasonably cheap (for your goals) advertising, like in Arts and Culture type newspapers, billboards or building-side ads.
Digital ads on social media like Instagram and dare I say TikTok, geotargeted in the areas your app is bringing up the most events/where your highest quality users can even potentially be.
I also got some good traction posting on a couple subreddits, but I learned that you have to be very careful abiding by the rules about posting about your own stuff, and other details. After a couple posts with amazing trajectories that were shot down, I stopped even trying. I know some people have had more success by convincing their users to post there, which sidesteps much of the potential drama around self-promotion.
1: https://news.ycombinator.com/item?id=6335784