Photo by wolfpackWX.

By DCist contributor Melinda Contreras

SCIENCE: Learn all about the world of the ultra-cold with physicist Trey Porto of the Joint Quantum Institute. Lasers, GPS technology, and atomic clocks will also be part of this discussion around all things cold. Presented by the DC Science Cafe. Busboys and Poets (1025 5th Street NW) 6:30-8:30 p.m. Free

ART: Little Salon, a community bringing together “D.C. creative types — makers, performers, appreciators, and everyone in between — in informal, conversational, utterly accessible settings,” presents an evening of photography, classical quartets, poetry, and fiction. There will be “beer in a bucket and wine on the counter,” but you are welcome to BYOB to add to the collective pot. (1319 Naylor Court NW) 7 p.m. Free

GHOSTS: Woolly Mammoth Theatre Company presents “White House Ghosts: An Evening with Presidential Speechwriters from Bush Sr. to Obama.” The evening will begin with a reception and book signing by Robert Schlesinger, author of White House Ghosts: Presidents and their Speechwriters. A panel discussion featuring former presidential speechwriters Mary Kate Cary (George H.W. Bush), Jeff Shesol (Nill Clinton), Noam Neusner (George W. Bush), and Adam Frankel (Barack Obama) will follow a special benefit performance of The Totalitarians. Woolly Mammoth Theatre (641 D Street NW) 6 p.m. Tickets begin at $75

FOOD TRUCKS: Thinking of opening a food truck? Just want to know what it’s like to open one? industree and the DMV Food Truck Association present “Under the Hood: An Inside Look at the Food Truck Industry.” Takorean, Hula Girl, Crepe Amore, CapMac, and the soon-to-be-opened Dirty South Deli Truck will share the highs and lows of operating a food truck. Food and drink samples will be served. Dolcezza Gelato Factory (550 Penn Street NE) 5:30-7:30 p.m. $35

BOY BANDS: The seven members of South Korean boy group Block B perform at the Warner Theatre. (513 13th Street NW) 7:30 p.m. $53-97