Bluewind is a small consulting company based in Italy (embedded systems). We switched from "almost all devs in a room" to 2/3 devs per room maximum while building our own offices recently. And common spaces for meetings, conferences and telephone calls. Encouraging to work from home when possible also. Interesting: working this way and adopting Agile principles makes enhances collaboration a lot, much more that in the previous open space where having everyone in the same room makes it almost impossible for people to talk each other when needed.