6:30pm-8pm, $15, New-York Historical Society,170 Central Park W, nyhistory.org. For 50 years, historian Blanche Wiesen Cook and playwright Clare Coss have been partners in life and in activism. The pair met while organizing against the Vietnam War and participated in the gay liberation movement following the Stonewall uprising. Please join them for a conversation about this pivotal moment in history and celebrate their lives and scholarship.