I stayed in Hotel on the beach Da nang, had a girl visit me used either wechatt, or thia friendly. Reception phoned to see if I was expecting a guest so no problem there.
Also there's a VIP massage place on the beach road, steam sauna shower massage I had hand job, but more available.
Also if your there Friday Saturday or Sunday to go the Dragon bridge in the evening spectacular. There's a market and street food to enjoy as well as the Dragon.