Any groups for people who want to lose sizes?

There are many groups out there to lose x pounds but the scale is just one measurement. I prefer the measuring tape approach myself. I've been such a slave to the scale and obviously that is important but I want to expand my view of defining successful weight loss.

Are there any groups where people are focusing more on reducing clothing size or even another type of measuring approach than the scale? Maybe this is a silly idea and I'm OK if that is general consensus too.