1. Familiar with piano music by Richard Clayderman, "Autumn Whispers", "Adelina by the Waterside", "Letter to Mother", "Memories of Childhood" , "Starry Night Pianist", "Dream Wedding", etc. These are very suitable for background music and are suitable for all countries. And these songs will never go out of style from the past 10 years to now.
2. Play piano classics with soft and beautiful melodies, such as "For Alice", "Dream of Love", "June Barcarolle", etc.
3. Play popular songs. There are many, such as "If the Clouds Know", "Listen to the Sea", "Invisible Wings" and so on.
4. Play blues or jazz-style ditties. Music libraries usually have a lot of piano scores in this category.
5. If you are good at singing, you can play and sing on the piano, such as "At least I still have you", "Secret Fragrance", "Who", "My Name is Elaine" and so on.
Another reminder, in some high-standard bars or coffee shops, there will be some guests who temporarily request singing or playing, which will put a certain degree of difficulty and pressure on the pianist, and they need to learn some simpler ones. Easy improvisational accompaniment, or prepare twice as many songs to cope with it!