I think most local newspapers have about as good as one as any. Facebook Events also has largely filled this.

As a Y Combinator partner for five years, it never failed that some hundreds of applications every single time were for local events startups.

That's probably the moment where I should be pissed off how great drop!in was in its day and if VC's in South East Asia would be less risk adverse it might have likely been a much more successful business than it was.