da nang night life is normal. mainly people go around the beach. Danang have many roof top bar.
most of the massage place also can get extra services between 1.5M (dont ask me the name because i forgotten) basically you can judge but looking at the main entrance or signboard of the massage shop.
or else you download Wechat or Line and search people nearby. Wait for 15 - 20 minutes and you will see many girls will add you on friend list. if you lucky, some of the girls might want to video call with you just to ensure you are a foreigner instead of local.