I cant talk for everyone, I think it depends on the person entirely. I have some friends who yes, actively go out "looking like sex" - and thats what they want from a "good night". I also have friends though who dont wear any makeup, wear glasses etc on a night out - not to say they arent looking for a ONS, some are, some arent, most in this category don't want to waste time on their looks too much/are confident. Then theres friends who are similar to me, I dont wear any more makeup than i would in the day (just a natural look to emphasise eyelashes/cover spots) and on a night out I do dress a lot more provocatively than in the day. The majority of the time - its still very classy, I dont think i've ever left the house with legs and cleavage on show. One or the other, I personally think is fine - obviously nothing too revealing that my bum is on show, and likewise ill never have my entire chest out, just a very little bit of cleavage thats almost impossible to cover up with most clothes in shops these days. Most girls tend to wear high heels the majority of the time - i think this is to do with expectation. I am short, but i spend all day being short often around the same people, i dont suddenly grow 6 inches by the evening. I think its almost going out etiquette? Just like how I'd turn up to a formal event dressed accordingly.