If I can already put together a group of friends, what's the compelling reason to add another group?
This would seem much more helpful if it helped individuals to form groups of friends spontaneously.
You can use FriendsTonight as a single person, but really would prefer you to use it as a group (it's more safe and less awkward).
Have you ever been out with a few of your friends and tried to meet new people (either romantically or non-romantically)- wouldn't it be cool if you knew people nearby wanted to meet you as well?
No, I have not. When I go out with my friends, I usually want to hang out with my friends.
Sometimes, however, all my friends are busy but I'd be up for meeting some new ones.