This is called Karaoke Box, a shop where guests will rent a small room with a sofa and table for singing with friends. They usually sing some songs using the Karaoke machine, drinking and eating something. Karaoke Box is a typical entertainment spot for young people after having a dinner with friends.
But we can use this box in the other way. If we would like just to drink and rest relaxed in the middle of Tokyo after wandering around, the box will satisfy us. The fee during daytime is very reasonable, only about 1USD per person and per a hour, and the fee allows us to have an temporary private room.