Mark Molesky, co-author of Our Oldest Enemy: A History of America’s Disastrous Relationship with France, will speak to the Young Republicans of New York tonight. The event begins at 7:30 pm. It’s at the Soldiers’, Sailors’, Marines’, and Airmen’s Club at 283 Lexington Ave., between 36th and 37th. Open to the public, but there’s a $5 fee for non-members.