ART: It's the 50th Sketch Tuesday event, featuring live art-making by a huge line-up of seasoned, local artists, which will be for sale for cheap at the show. DJ Pre-K will be spinning tunes and tonight's film projection will be Tuff Taco by Ferris Plock and Jim Dirshberger.

6 to 10 p.m. // 111 Minna Gallery (111 Minna St) // free

VARIETY: The monthly Les Folies Champagne is having a Pre-Holiday Shebang, featuring music by Kitten on the Keys, burlesque by Mischevious Maidens, magic Ash K. the Pretty Good, tunes by DJ Blaise, a sexy Santa booth, and champagne specials all night long.

8 to 11 p.m. // The Bubble Lounge (714 Montgomery St) // free

LITERARY: In What Technology Wants, author Kevin Kelly argues that technology is an extension of life -- an acceleration of the mind -- and discusses how we can best steer technologies into their best roles and capture their gifts.

7:30 p.m. // The Booksmith (1644 Haight St) // free