Ian Brennan had better hope the Bush administration doesn’t call his bluff. Brennan, a self-described “wimpy, bleeding-heart, hippie liberal from California” has challenged President George W. Bush to an eight-round boxing match, mano a mano, on Cinco de Mayo. Brennan (FBI Watch List No. 323664829) takes issue with the hundreds of U.S. soldiers and thousands of Iraqis and Afghanis killed so far during Bush’s presidency. So he’s staging the “Boxing Bush Benefit,” featuring music by El Vez and Fannypack, with proceeds benefiting the charity of the winner’s choosing. Sounds worthwhile for Brennan, who’s surely betting the commander-in-chief won’t show. But what if ol’ Dubya actually steps into the ring and draws a custom-made Halliburton pyrophoric sword tipped with depleted uranium? See whether Brennan joins the burgeoning body count at 8:30 p.m. at the 9:30 Club, 815 V St. NW. $15. (703) 218-6500. (Chris Shott)