This week, NightLife is bringing the groovy back with some of San Francisco’s hottest disco fiends. Join the DJ crew from Go BANG! for a Silent Disco in African Hall, and shake your funky best alongside zebras, lions, and live African penguins. In the Piazza, the DJs behind La French SF Champagne Disco promise to understate the obvious and over deliver on the unexpected. Test your Seventies Smarts with trivia organized by Brainstormers about the science and pop culture of the era. And in the planetarium, don’t miss a live presentation on Astronomy of the 1970s at 6:30, followed by two showings of Earthquake. Can you dig it?