You'd think that after standing up in 3 weddings in the past year, I'd know what to wear to a rehearsal dinner--but I've got another one this weekend, and I'm at a loss. I remember wearing a dark sweater, dress trousers, and black Gucci loafers to one of the dinners--is that appropriate? Can it be casual or should it be more formal than the ensemble I wore once before? I think the restaurant is only moderately expensive, if that helps. Thanks.