OK, so you need an outlet for a lamp behind a sofa in the middle of your Great Room. What do you do? Running an electrical cord on the floor covered by duct tape to the wall plug is one answer, but a pretty bad one. Well now there is a great product to answer this problem. It's been used in commercial office construction for market.
The product is a Poke Through Electrical Floor Box and this photo shows a Carlon model E971FBDI. Carlon's product is great because it comes with everything you need for a complete installation.
Plus not only can you use it for electrical power, but it has adapters for telecommunications such as a phone line or computer network cable.