I love a woman who puts some effort into how she looks when she arrives at my hotel. She can be elegently dressed if we are heading out or If I am staying at a really high end hotel.  She can also be dressed college chic in jeans or even dressy casual.  I think she should dress to her surroundings without drawing any unwanted attention to herself.  That means no sluttty looking attire -super short mini skirt and 6 inch heels.  

But, no matter how a woman is dressed her hair, makeup, hands and feet should be manicured and on point. Finally she must have great lingerie on - or with her to change into.  

I don't think that is too much to ask for in this business when you are paying $500.00/HR or more.  
I take great pride in how I dress, look and smell before a date so I expect the same in return.   I guess I prefer more a little more glam!