At 1 a.m. Thursday, Jamie Foxx jumped on stage during Kanye West’s private-party show at the Exdo Event Center in Denver, surprising even West himself, and the two did a roaring “broke . . . broke” version of “Gold Digger.” And that was just a small highlight of West’s hour-long set at the packed warehouse-turned-club. He improvised lines about his late mother and Democratic presidential candidate Barack Obama at the end of “Flashing Lights,” did killer versions of “Touch the Sky,” “Jesus Walks” and “Stronger,” and generally rewarded a sweaty crowd at the packed-in party for Bono’s anti-hunger One group and the Recording Industry Association of America. Earlier Wednesday, Rage Against the Machine provided the pre-protest soundtrack for Tent State University at the Denver Coliseum. Tom Morello sprayed riffs everywhere for the opening “Guerilla Radio,” “Wake Up” and “Killing In the Name.” Guitarist Wayne Kramer, who performed at the infamous 1968 Democratic National Convention protest in Chicago, sat in for an explosive take on MC5’s classic “Kick Out the Jams.” Later, Rage and Denver’s Flobots joined thousands of protesters in a peaceful five-mile march to the Pepsi Center, just after Sen. Hillary Clinton demanded her party’s vote of acclamation.