Suz, I'm so sorry for your Siebels... mine don't do that! And I wore them last year continuously for 2 months in rainy BC.
I like 3-4 the best for the event you describe. The sequin adds fun sparkle, just in line with an evening event. Arm candy there brings it just at another level.
5 is good too but the sequin debardeur looks too long there. It falls lower, elongating the torso. Maybe with a belt?
1 is too casual.
2 is too scholar.
6 is awesome, but too formal.
7-12 is also stunning, but too much day presentation. My faves in there are 10-11.
13 is also very cool and worth considering. Hhhmm... it appeals to me because it is so fashion forward yet naughty, in a Coeur-de-pirate kind of way. All you need now is an arm tattoo! (Joking). You look ravishing: every element here work together to create the look, from the pearls to the rolled sleeves and collar turned up to the booties.
But considering it's winter and that Christmas is approaching, I would go for the sequin outfit. Just because pic 13 seems so perfect, putting a winter coat over it would kill the look. This requires a cropped jacket. And since you'll be in and out, you should really plan your outerwear as well.