Movies The rule is unspoken, but obvious. No T-shirts or sweats when you watch Lagerfeld Confidential, a documentary on the life of the legendary glamourpuss. Museum of Fine Arts, from today until January 17, $9. All showtimes from the MFA. Music Reconsider the ukulele with "Viva La Revel-UKE-tion!," in which the East Boston Make-Out Club Band and others pay musical tribute to the laid-back instrument. Club Passim, 26 Church Street, Cambridge, 8:00 pm, $10.......