If you are male it is okey to do one night stand. Especially if you don't have a permanent companion. It is our nature.
Personally I believe u can compare this and with a lot of alcohol consuption for more joy.
If u are a woman it is no no. I can understand it if a girl has recently seperate and is very sad and wants to take revenge.
Otherwise you have to find what is wrong with your feelings and try to socialise. I know that sex is wonderful think but one night stand is not woman's nature - except if she wants extra money than is physical.
So my advice is if you are a woman and go for it try not to pay for anything , otherwise it will be very pathetic.