By the way, Chemda, Grouper is EXACTLY your group idea where it's 3 friends meet 3 friends. Since that was your idea and it's actually a successful app, you are on the right path to your yacht, you just gotta keep working on it!
I think SurveyDate could work though! Kind of brilliant and would be fun to setup a survey. You should contact your brother
Best,
Oconn