I've gone to a few GrubWithUs events and found them terriby shallow, boring and exhausting. Throwing together a bunch of strangers at random and hoping that something sticks is a very bad strategy for making friends.

I'd rather go to a Meetup where at least I can have a chance to learn something with people who care about something other than food. Being stuck at a table with the same haphazard group of people for hours? No thanks.