These have been interesting replies so far! I suspected that most folks have considerably more than two things plugged in at the bedside, or even two things on each side. I'm seeing that, indeed, most people have far more than that.

Just eyeballing the answers so far, I'd say that around six items on each side of the bed is pretty typical. So even a two-gang isn't really sufficient. It sounds like a three- or four-gang, or equivalent, on each side of the bed is really about what is needed to take care of the typical couple.