Having worked in one of these, we found those sorts of "team offices" hurt collaboration and innovation even more than open floor plans. Unless the company is pretty small, the random conversations between people from different teams is often the key to innovation and getting problems solved early. A team room means that to ask a co-worker on another team a simple question or to just see what they are working on becomes a big deal because you are now entering that other team's space and interrupting a dozen people. Unless you really know the other person well, we found people just are hesitant to do it.

In big companies, there usually isn't a problem with communicating within a team - the problems occur when teams aren't communicating with people in other teams. These team rooms ruin any informal inter-team collaboration and communication.