Bro, it's a matter of perspectives. Normally, ladies will butterfly on their own, & there may be reasons why she did not.
1. With the complaints about butterfly by many customers, the owner of the KTV may had decided that it is better to control the ladies, to not butterfly, in order for the biz establishment to survive, amidst this still evolving post covid era of changes & govt policies.
2. As some kind bros had said, it may be how that particular pub operates. You can still reject any lady if you wish. Ultimately, on a nite's out, we bros are not looking for girlfriends, just companionship for a moment in time.
3. It may be that she is new, likes you, & think that time & money foregoing tips by butterflying is better spent with you. Afterall, these ladies are not prostitutes or seek to be one, but to only earn a few dollars to help their family back home to meet rising costs, & probably only earns US$150 a month as a salesgirl in Vietnam. To her $50 from you is enough. Not all viet ladies are greedy, especially the new, & do have a mind of their own.
Lol!. Count your lucky stars, bro. Some other brothers at hi-end KTVs whom paid hundreds of dollars for women & wine can't even get a lady to spend 10mins on the hour with them
Guess this is how it is gonna be till the situation stabilizes, & for bros, to consider alternatives to current obviously mismanaging viet mamasans/guest relations directors whom are not talents in hi end KTVs instead