These all are such great strategies!
MsMary and Carter - I was specifically considering myself in a situation of a company retreat for my small creative and high tech company. I wanted to not stand out, you know?, and I wanted to come off as unintimidating.
My first thought was to reach for something light pink and a cardigan, of all things. (I own nothing pink except shoes.) I must have been trying to psych myself out by trying to go J Crew on the gang, when, really, all these ideas about simple shapes, fabrications and colors - and black! -make way more sense, when trying to blend in. (What I ended up with, below, with grey skinnies.)
ETA This outfit was because I didn't think to post the question to the forum until after the event. But *next time* they won't even know I'm there!
I love this forum.