Freewilliamsburg friend Russ Marshalek is throwing a party at Glasslands. (He’s part of the collective ADVENTUREs, who brought you the popular Robyn Party.) Don’t miss the Myspace party this Friday at Glasslands: Russ Marshalek and fellow soundtrack spinners Chris Choyce and Marley Magaziner originally wanted to create an event dedicated to the music of Myspace-era bands such as Dashboard Confessional, Saves The Day, and the Killers, but eventually decided to extend the bash to the whole website. “One of the first genres we agreed upon was the pop-punk-screamo-emo genre,” said Marshalek, who lives in Greenpoint. …