I'm below 60 and with average, but seems still "acceptable shape". So I still use "free service". In bars in Thailand when I'm alone, I pay tips for sitting with me, but I don't off boys. That why I can't discuss prices or service of MB in VN, nor can recommend any of them.
These, who was with me in VN at time of past visit, were students, they didn't ask for any money and even paid drinks in bars themself at evening, but accepted invitation to breakfasts what I paid.