A: Good news—you won't have to invent a role for your friend. There's no bridal law that says you have to have an equal number of male and female attendants. Single attendants of either sex can walk up and down the aisle alone or in pairs, or a groomsman can accompany two women, one on each arm. As for the first dance, it's optional to have the entire wedding party pair off to join you and your husband for a spin. If you do want everyone on the dance floor, your solo maid can dance with her date or with another honored guest—your grandfather, a family friend or a favorite uncle.