(this post is a feed post from my comments on reddit)
r/startups
sounds like meetup.com / or even TimeOut magazine
your challenge is compounded due to the fact this is also a network effect problem (Andrew Chen – Cold start, google it for more info)
so IF you really want to go down this route, either pick a very specific niche (tattoo conventions for example) or be specific about the location (a specific city for example)
but basically, yeah you’re going in with a product that is very generic and is a bit ‘winner takes all’