dance attendance (up)on (someone)
To perform assiduously and obsequiously any task required or requested by someone. After earning his fortune, he now has servants constantly dancing attendance on him. He's always dancing attendance upon us so that we'll let him hang out with us.
ˌdance atˈtendance on somebody
(British English, formal) do a lot of small jobs in order to please somebody: She always has an assistant dancing attendance on her.