I have a failsafe uniform for those casual evenings. I always feel appropriately dressed in it — not over dressed, never underdressed. At the risk of being thought a one-trick pony, I highly recommend having several mix and match pieces that will see heavy action through the coming party months.
Here is mine:
Sweater: Black silk cable knit (and getting ready to be replaced, soon. But where to find another? Until then here are a couple of offerings in other yarns.)
Ivory, grey pencil stripe, or white shirt. (The classic pinpoint button down works well here as the collar holds up under the sweater or I use the collar bones to help prop up the collar points.)
Flat front super 110’s worsted wool medium grey or charcoal trousers. If you must buy clothing this season, buy a pair of flat front grey trousers, they are genius. Mine are the Todd model by Zanella.
Belgian shoes, Venetian or penny loafers. In black. It’s night.
Opt; neckerchief in black and tan, or black, white and red. For the colder evenings.
With no time to dress or a need to travel light, my uniform gets me through any number of situations. After all, if a variation of it is good enough for this guy…