What songs do piano players play in hotels?

My roommate plays the piano in the hotel. The first thing to look at is your ability to improvise. It takes at least 1-2 hours to play music once in the hotel. Even if you know all the world famous songs, there are not many left after the first day. In fact, there is a very simple method, that is, playing some popular songs, classic old songs and the like. Simply playing a simple score and live accompaniment is enough, which is very easy and does not require hard practice before. At the same time, customers also like it and will hum along ~