There is a song that reminds me always about that night. Massive attack- Teardrop
That is a great song. One of my all-time favourites for relaxing. Another one is Hayling by FC/Kahuna:
It's just so relaxing and also just sort of takes you away to another place. But for me it is so rare to find songs like these, they are just a different kind of music altogether. There needs to be some kind of rating system for music that can not just relax you, but teleport you to a world of introspective relaxation.