Humanitini: Caps, Nats, Wiz, and Skins, a discussion about local sports fandom moderated by SpeakeasyDC's Amy Saldman, will try to answer the question, "Can a city with a large transient population attract dedicated home-team supporters?" Axum. 6 p.m.
David Rothkopf's new book, Power, Inc., examines the "epic rivalry between big business and government" through a historical lens. "Striking the right balance between private and public power is the fundamental challenge of our age," writes the Foreign Policy editor-at-large. Politics and Prose. 7 p.m. Free.
Author Mike Zweig discusses his latest book, The Working Class Majority, about power and class in America today. Busboys and Poets (5th & K). 6 p.m. Free.