Hi. I'm soon going to my friend's birthday party at a restaurant. I don't think it is a posh one. I don't go out at night so I don't know what I should wear. I might add I want to look amazing to impress some people who will be there but are two faced/fake to me - childish I know - I'm 35, size 8/10 (but just bought a skinny jeans size 6 from primark!), 1,65 m tall and athletic body shape. I hate showing cleavage/tights and hate being cold. Any suggestions?