There is a great chance that if you love music, you will come across Sunny Rattana at one of Bangkok's many music venues.
One of the top pianists/keyboard men around Bangkok, Sunny can deliver multiple styles ranging from Jazz standards as well as his own composition, with our without his trio. I've seen Sunny at Saxophone Bar, Whisgars, FooJohn Building and Maggie Choo's in the space of a week this August--really a man about town. Visit his Youtube Channel and Sunny Trio & Natt Buntita's Facebook Page for recordings of his performances, show schedules, and more. Check this one out:
If you're into Sunny's music, you can find out out where to go to listen to the best live Jazz in Bangkok here.