Ah ok, you're talking pre-war.
Yeah of course in the states we had just light sockets at first, but maybe we were a little quicker to adopt wall outlets. Here in Chicago, anyway, all the houses built in the '20s have fairly normal electrical setups, by today's standards. Typically at least one wall outlet in each room, lights in every room, etc. In fact, I would say a house from the '20s in Chicago, anyway, would still be up to code, with the exception that outlets are now required on just about every wall, to discourage use of extension cords.