Yusuke Kawai tries to start a para para dance halfway through his Sept. 5 DJ set, but the inside of an Apple Store isn't an ideal space for this endeavor. Kawai, who records under the name tofubeats, is performing a special show at the recently opened Omotesando store. Half of the floor eagerly watches the producer, while the other half looks at iPads, occasionally looking up at the guy playing, among a whirlwind of other genres, a hyperactive form of dance music last popular in the late 1990s.