Back to the original question.
If in some way you are enjoying the effects of the kpins in a club setting then yes, for you it can be a substitute for alcohol.
In my opinion, the alcohol 'high' is about the worst 'high' of any drug I've done. I put high in quotes because compared to the high of coke, meth, opiates, mdma, etc, its a joke. More like a low in my opinion.
I would say that if you stick to the dose you are using and limit yourself to just 2 nights a week you are not going to get into any trouble with tolerance or withdrawals or anything like that.
For me, no benzo has a recreational value when taken alone, they just put me to sleep. Only when taken with LSD or meth are they of any use to me. So if you are getting what you want out of them, then go for it. They are probably better for you than alcohol anyway.