The Pittsburgh Chamber Music Society and Chatham Baroque are teaming up for the first time to present Bach's Brandenburg Concertos No. 2, 4, 5 and 6 at 7:30 p.m. at the Twentieth Century Club, 4201 Bigelow Blvd., Oakland. The Chatham Baroque musicians will perform alongside Stephen Schultz, baroque flute; Josh Cohen, baroque trumpet; Debra Nagy, oboe and recorder; Aik Shin Tan, recorder; Adam Pearl, harpsichord; Allison Edberg, Annie Loud, Leslie Nero and Dawn Posey, baroque violin; Kristen Linfante, baroque viola; Shelley Taylor, baroque cello; John Romney, viola da gamba; and John Moore, double bass and violone. For tickets, $40, 412-687-1788 or www.chathambaroque.org.
The holidays arrive in Oakland with the annual Women's Committee Carnegie Trees Opening Celebration from 5:30 to 8 p.m. in the Hall of Architecture at Carnegie Museum of Art. The theme this year, taken from the 2013 Carnegie International, is Embracing the Art of Play. The Neapolitan presepio, a large Nativity crafted between 1700 and 1830, returns and a bonus in the festive hall is an installation by CI13 artist Gabriel Sierra. But holding center place until Jan. 12 will be the six 20-feet-tall, lavishly decorated Colorado spruce trees. Cocktails and hors d'oeuvres will be served, dress is festive attire, admission is $75 (reserve or information at www.cmoa.org or 412-622-3131).
Kelly-Strayhorn Theater presents Groove Aesthetic: Bach Boom Box at the Alloy Studios, 5530 Penn Ave., Garfield, at 8 p.m. Vocalist Anqwenique Wingfield leads the crew as the chameleon who goes between opera to rhymes all in one set. The eclectic mix of artists includes MC Shad Ali, jazz band TRIO +, choreographer Anthony Williams, DJ duo Tracksploitation, MC duo Creative Chemistry and visuals by Magic Organs. It's a mashup of disciplines that highlight the parallels between Bach and Biggie, ballerinas and b-boys. Bring your furs, clutch your pearls, and let your swag flag fly. A dance party follows the performance with music provided by the band TRIO + and DJ duo Tracksploitation. For tickets, $10, www.kelly-strayhorn.org.
Grammy-winning artist Michael McDonald will perform at the Palace Theatre, 21 W. Otterman St., Greensburg, at 8 p.m. In addition to songs from his new album "Unfinished Business," Mr. McDonald will be performing some of his all-time hits including: "I Keep Forgettin'," "Yah Mo B There," "What a Fool Believes," "Minute by Minute" and more. Known for his soulful baritone, he began his career singing back-up vocals with Steely Dan. In 1976 he became a member of the Doobie Brothers, which resulted in several hit songs with the band. For tickets $45-$85, www.thepalacetheatre.org or 724-836-8000.
All-women's choir Belle Voci is kicking off Christmas festivities with a free concert at St. Stanislaus Parish, 57 21st St., Strip Distict. "Belle Voci a Natale" will feature traditional holiday songs, gospel versions of traditional Christmas spirituals, Britten's "A Ceremony of Carols" and more. Harpist Lucy Scandrett, organist Gail M. Henry and Duquesne University chamber choir Voices of Spirit will perform at the 7:30 p.m. concert, conducted by Craig Cannon.
The Pittsburgh Camerata will present "It Was All Shining: A Camerata Christmas," a concert of choral and instrumental music that tells the Christmas story, at St. Andrew's Episcopal Church, 5801 Hampton St., Highland Park, at 8 p.m. Works include Tavener's "The Lamb," Higdon's "O Magnum Mysterium" and traditional carols. Flutist Josie Kost and oboist Lenny Young will perform with the chamber choir. Additional performances in Mt. Lebanon United Methodist Church at 8 p.m. Dec. 13 and at Sixth Presbyterian Church, Squirrel Hill, at 8 p.m. Dec. 14. Tickets, $15 advance general admission; $20 at the door; $5 full-time students. 412-421-5884 or www.pittsburghcamerata.org.
Shake hands between 11 a.m. and 1 p.m. with someone clasping a wad of clay and make an impression that will become part of "Touch in Real Time -- Handshake Collection" at the Society for Contemporary Craft, 2100 Smallman St., Strip District (free). The project, by artist Holly Hanessian, includes "handshakes" collected across the country and the resultant artifacts are displayed at the society and at its Satellite Gallery @ BNY Mellon Center, Downtown, through Jan. 5. Information: 412-261-7003 or www.contemporarycraft.org.