I would use them as a contrasting accent to a more conservative/polished look. A hint of "oomph" ! Maybe navy, grey, or deep burgundy trousers (wools or tweeds or velvet)' with patent shoes - black or cordovan brogues, or chunky velvet platform mary janes or booties? They could make a cheeky contrast to menswear look...not something you see all the time, but just a little peek!