If you go on proper dating sites like plenty of fish or match.com, you will have more success. The real hotties there are there for serious relationships in the most. No woman is going to advertise themselves for NSA sex....I've never seen it. Remember to be fun, make her comfortable (escalate to phone number), qualify...while keeping a 'screening' state of mind...i.e you want to meet her to find out more about her..whether she is worthy of your attention