Led by actor-singer Olly Alexander, trendy electronica trio Years and Years are kind of like the new Alt-J. A month ago, the BBC announced them as the winners of its "Sound of 2015" award (a distinction previously earned by Sam Smith and Haim). They have yet to release an album, so it's the perfect time to catch an up-and-coming band before it's headlining larger rooms. Tei Shi opens the show with her dreamy R&B.