jeans at a family party. .

[crikeybill]

Im going to a 21st birthday party on Saturday. It's in a social club, bar and disco type thing.
I was going to wear a little black dress but now after talking to some of the younger girls in the office I feel like I'm going to be over dressed. Im 39.

Someone suggested dark jeans, heels and a floaty blouse type top. Would that be okay ?

Yes

I would where that to that type of establishment quite happily!

Yes to jeans and floaty blouse lots of these types of blouses around.