I don't bother to linger around with those who are like that, except for short time. Wouldn't settle for half a relationship either, anyone with a bit gut feeling and proper farmer logic would know when this is the case.
However, few people have proper gut feeling and farmer logic, specially nowadays. Of course many of the old guys are aware but do not care, they know they pay for services. That is fine right, nothing personal just business.
Would not claim it is limited to bar girls either, many other girls with normal jobs are exactly the same. The only difference might be they do not request money per time, day or month, but they still cost it regardless over time.
Sure, we could all settle for this hard working 6 day a week office type of girl, who is boring as <deleted>, and never has free time to do anything. Sure she will be loyal.