To be fair, the whole hookup thing hasn’t worked too badly for couchsurfing. Perhaps it’s just inevitable that people will use these sites to get laid?
People have been using social things to get laid since the beginning of humanity. Nothing wrong with that. But a site full of low quality thirsty profiles isn't going to appeal to a large group of people.
Aren't most dating sites full of low quality thirsty profiles?
Couchsurfing went from being widely used and respected by travellers everywhere to being almost completely dead and forgotten. How did anything work out well for that site?
Couchsurfing has tried to kill their app, but people still somehow use it.
That's mostly couchsurfing's own doing though
That. I think just if this is to scale, have some iconography to indicate the types of relationships you're providing/looking for.