Aesthetic surgery does seem to be a difficult endeavor for partnerships and group practices. I have seen a few work out in which it was simply overhead that was shared; even call between the members for cosmetic patients could be problematic. Due to the economics of aesthetic surgery, jealousy, mistrust and discord seem to arise fairly commonly. Marketing for a group of aesthetic surgeons can be difficult- if one person feels if he/she has more training in the latest techniques, it can be difficult for that person to be "weighed down" by his/her partners.
That being said, a few group aesthetics practices that I've seen in California and the Northeast seem to be doing well. One common attribute was that almost every facet of the practice was clearly delineated and boundaries well demarcated. This obviously decreased the potential for arguments and "turf" wars for new consults.