Photo by Danilo.Lewis|Fotography.

PHOTOGRAPHY: Calling all Astrophotographers! Head to the Lincoln Memorial tonight for the DC Social Flickr group’s Harvest Moon meetup, and join in for an opportunity to photograph the moon rising while lined up with the National Mall. Then show them off by adding them to the DCist Flickr pool. 6 p.m. Free.

FOOD & DRINK: Did you grab OpenTable’s most recent Spotlight Deal (which they announced today)? Then head to Zengo (781 Seventh Street NW) to cash in your $25 for $50 worth of food. If you didn’t get the deal (limited to 100 people), or you just want to do happy hour, Zengo is offering $5 cocktails and $5 small plates (Angry Zengo Roll, Crunchy Calamari, Thai Chicken Empanadas) from 5-7:30 p.m.

>> Brickskeller’s (1523 22nd Street NW) beer school continues. Tonight, the “Around the World” session will cover beer ingredients, the brewing process, styles of regions/countries, abbey vs. trappist beers, the history of Belgian beer and more. During the class, you will sample 12 different beers (3 ounces each). 7- 9 p.m. Tickets are $35.

TV: Kick back at home tonight and catch Joaquin Phoenix on The Late Show with David Letterman. Phoenix is sure to talk about his recent film, I’m Still Here, how it was a hoax, and how Letterman was in on it. 11:35 p.m.

MOVIES: Pay what you want and see Freakonomics: The Movie at E Street Landmark Cinema (555 11th Street NW) tonight. In order to score tickets at the price you want, fill out this survey. 7:30 p.m.

>> Catch a free movie and discussion at American University’s Baby Boomer Film Series session tonight, featuring a screening of The Graduate and professor Lenny Steinhorn leading his class and attendees from the public in the talk. Head to the Weschler Theater in the Mary Graydon Center on American University’s campus (4400 Massachusetts Avenue NW). 7 p.m. Free.