I'm starting a group weight loss challenge on ourweigh.in website because most of the public ones don't look active. If you want to joint is free! It's based on percentage lost rather than specific amount of weight. 3 months is usually the longest I want to cut at one time. So I'm going to run the first one for 3 months.
If you look at the public groups it is labelled "The Rebellion".
If you want a direct link to the challenge you can PM me your email address. < 3