Broken Disco just keeps getting better. This month, Berlin's Modeselektor returns to Seattle supporting their sophomore record, Happy Birthday!. The last time the duo was here, they leveled Re-bar with their booming, bass-heavy mix of electro, dub, breaks, and techno. Tonight, they're joined by Seattle's own tech-house wizards Jacob London and DJs Recess and Introcut. In the lounge, dubstep ambassador Struggle will be joined by Nordic Soul and Electrosect. Speakers will blow, foundations will shake, legs will liquefy. (Chop Suey, 1325 E Madison St, 324-8000. 9 pm, $12, 18+.)