Used to attended wide variety of Meetups and used Couch Surfer too. It’s pretty obvious when people are attending or using a platform for dating, though they rarely say so. For example, hosts that only host attractive females on Couch Surfer. Or meetups where attendees leave if there’s no attractive female that are in attendance or only talk to the attractive females. Even females that are interested in dating are easy to spot too in my experience. — Very rarely are people that are interested in dating taking a friends first approach, it’s time consuming, and to my knowledge no platform that enables users to build a “friend reputation score” based on users rating them.