Can a bard use versatile performance (act, comedy, sing or string) as a substitute for bluff in the bardic masterpiece Pageant of the Peacock?
Technically yes, because you are making a bluff check and therefore using a performance roll and then substituting that for the intelligence-skill check.
That said, that masterpiece is usually recognized as the straw that broke the skill-monkey's back, so you can always rule against this or against its existence entirely.