For example, my current employer has wide-open office space with pods of desks, but they also offer numerous privacy rooms for escape. As a mild to mid introvert myself, this allows for the best of both worlds the majority of the time: I can benefit from those casual, spontaneous conversations that pop up in the open space, but I can also grab my own room for an entire afternoon to crank out some heads-down work.
I think what's most important is for companies to acknowledge and respect the variety of working styles of their employees, along with the trust that--regardless of how chatting in a pod or hiding away from others might appear--more often than not they're getting shit done.
edit: words