No jeans and sweatshirts here! We usually semi dress up. The girls are usually in dresses or skirts with tights, I usually wear nice pants and top or a skirt and hubby wears slacks and button up shirt or polo.
Nice looking casual, not like jeans and a t shirt. When the kids were small I would dress them up a little... we always go to my mom's and she works hard on food and sets a pretty table and I feel like the least we can do is show up looking nice.