DH and I are going to quite a formal showy Christmas event in mid-December. It starts at 2pm and goes on into the evening in a hotel, its organised by one of DH’s ex colleagues (who likes to flash the cash) and will be a Christmas party plus a 55th birthday party for his wife (and I think his daughter's birthday too). I imagine there will be quite a lot of people there of mixed ages and no expense will be spared! There be a buffet and dancing but not a sit down meal so not unlike a wedding reception. I’m stumped over what to wear I would love to wear something like this
https://www.mytheresa.com/de/en/women/giambattista-valli-jacquard-a-line-midi-dress-gold-p00851724
but wonder if I’m too old for it and if its too OTT I’m 58 and 5 foot 8 and a size 10/12 so quite slim but have a largish bust (36D), what do others think? Should I play it safe with a more traditional dress?