I did once with some ex colleagues. Nice difference to have a girl in your arms to cuddle, grope and play drinking games with. I will never be able to go to standard civvie karaoke places with the same innocent mindset anymore hahaha!
However, I would have done the dirty had the other colleagues not got drunk to the point they accused each other of deceit and grassing up on everyone's SO's! Yeah, I know, what a sucky way to end the night.... Having to stop mates from starting a fight and leaving a hot girl at the door! Sigh....
Never figured out which place that was now in Mongkok area... We were all quite drunk when we stumbled across it that night. I miss that girl... We DFKd each other by passing a chewing gum to each other (or actually fighting for custody over it! Haha! That was fun

)