Support group ideas. Help please!

Our group usually has something prepared for the first half.  Either the nutritionist, a nurse, or guest speakers.  Next month we're having a rep from one of the vitamin companies.  In the past we've had samples from protein companies, a plastic surgeon.  Can't remember all so far.  Also, I would like to see our group have some kind of designation of before and after people so the befores know who the afters are if they are more timid and would rather talk individually after.  Like maybe anyone wearing a red ribbon has had bypass, yellow ribbon has had lap band, etc.  I like the 1/2 planned 1/2 free time approach.