I'm travelling to London in a few weeks to see my son. While I'm there I'm meeting his girlfriend's parents for the first time. We're going out to dinner. They are a few years younger and a lot wealthier than me. I have no hangups about that. I'm a confident career professional myself..but they are very wealthy financial services people. I will very much go as myself but do want to get hair and nails done. My style is understated so definitely no bright strong colours, no nail extensions so will be quite short..any recommendations for what's low key and classy in my 50s