Just back from Viet/Cam.  Excellent trip.   But all you young at heart 60's &70's children who like rock&roll loud music and a great atmosphere, try to miss the last night culture and not so good and cold food an spend as much time as you can in  PUB STREET in Siem Reap. All ages mix . Haven't danced to R&R for years 
66 and getting younger!!