My partner and I are spending a week in Wengen this month. I'm know to layer clothing during the day for walking but I'm less sure what to pack for evening wear. What do women tend to wear to dinner/bars in the evening? I do not want to be over or under dressed. Should I take some dresses or are trousers more appropriate and should I stick with smart flats at night or take high heels? Will a lightweight jacket be enough in the evenings? Thanks in advance.