Google has a new feature called Profiles, One can create new profiles, you see little 2nd circular icon on top of the main account on you have upper right on Chrome. I used it a few times, for Google Biz, and trying to use for Google Forums, but too confusing.
I think supposed to be fast way to get into places without having to log out of you main account and break sync there, but too confusing to understand how it works. In that I think you also have to go through annoying process of logging into them as well.. If anyone knows.. thanks.