Yeah, I've been staying at Edenstar during my trip to HCMC but I've never brought guests over because it seems they wouldn't allow that even if I did reserve the room for 2 guests.
I decided on Edenstar due to their location since it's close to my two favorite massage places and it's not too far to NPK street on a grab bike.
Planning on going to QB from there next week during my next visit.
Rule of thumb always ask before you book the hotel. I've never heard of a hotel prohibiting a female guest during the day but the 10pm rule is common. I think they want to prevent whore drama if its a family or business hotel and reputation is an issue. I don't understand why anyone would want a whore in their room when you can get a love hotel for 70k/hour and not risk your belongings or drag her through the your lobby for all to see.