Group Insanity Workshop - Does it work?

So... I've read lots and lots about Insanity. I've seen lots of inspiration before and after photos and I am determined to do it.

I'm thinking of setting up a group workshop, there'd be about 6 of us doing Insanity together, but I keep wondering if it would realistically work or if it's better to do Insanity alone. I have been known in the past to suffer from a lack of self motivation at times, although now I really do feel ready. But I can't help but think it would be better having a 'team' there doing it together.,

Has anyone had experience in doing this as a group? I've got a big room sorted above a pub, with a telly and dvd player and all set to start a week today.

I'd also like to stress that there's no money involved in this, I'm not trying to make a profit at all, the room is free as it's my friend's pub.

What d'ya think?