Ushers at Head Table?

Do ushers typically sit at the head table with the bridal party?
A little background, my sister is our usher. I gave her the choice of being a bridesmaid or an usher and that's what she preferred. She's not one for dresses and standing up in front of people, but is great in one on one conversation and knows most of the people attending (even grooms side).
I've never been to a wedding where the ushers sat at the head table I don't think, but I feel like she might feel left out if she isn't with us, since she's the only wedding party member that isn't a bridesmaid/groomsman. So would it be weird to have her there?