Craft Festival at BHS
New York Creates will be holding its Fourth Annual Holiday Crafts Fair at the Brooklyn Historical Society from 12 to 6 p.m. on both Saturday and Sunday. The event will feature over 25 New York City juried craft and folk artists. BHS is at 128 Pierrepont Street.

Brooklyn Critical Mass Ride
If it’s the second Friday of the month, it must be time for Brooklyn Critical Mass. Meet at Grand Army Plaza at 7 p.m. Bring your own bike.

ArtMart Shopping Extravaganza
On Saturday from 12 to 6 p.m., PEP Gallery will be holding its ArtMart Shopping Extravaganza, a chance to buy limited editions, multiples and wearable art from a stable of 20-odd artists. PEP is at located at 64 Washington Avenue in Clinton Hill/Wallabout.

String Orchestra of Brooklyn Winter Concert
On Saturday at St. Ann and the Holy Trinity Church, check out the String Orchestra of Brooklyn doing some Bach, Torelli, Vaughn Williams and Mozart. (By the way, why couldn’t Mozart find his teacher? Because he was Haydn.) The concert takes place at 8 p.m., 157 Montague Street. Suggested donation: $10.

Madeira Tasting at Greene Grape
On Saturday from 5-7pm, the Greene Grape will go old-school and uncork three types of madeiras from the Rare Wine Company’s historic series. On the menu: The New York Malmsey, the Boston Bual and the Charleston Sercial. Free, 765 Fulton Street in Fort Greene.

David Weeks Sample Sale
Modern lighting master David Weeks will be parting with samples and prototypes on Friday and Saturday from noon to 6 p.m. Bring cash or checks only to the studio at 68 Jay Street, #612A. Call 718-596-7945 for more info.

Secret Robot Holiday Market
On Saturday from 11 a.m. to 7 p.m., the Secret Project Robot and Sodafine bring you a highly-curated holiday market featuring quality handmade designs. 210 Kent Avenue, Williamsburg.

Clinton Hill, Fort Greene & Brooklyn Heights Tour
On Sunday, Mauricio Lorence leads a walking tour through these three historic neighborhoods, with a focus on historic sites, ethnic enclaves and municipal institutions. The tour starts at 2 p.m. at the New York Marriott (33 Adams Street) and lasts three hours. Call 718-789-0430 for more information.