The Empty Bottle sponsored another one of its free concerts at the Illinois Centennial Monument in Logan Square on Sunday, this time featuring High Places and Magic Key. Both are duos featuring a female singer playing keyboards with a guy playing drums or percussion. Both play music electronic pop songs with an indie-rock edge. High Places got a small crowd of people dancing near the stage, though it was not nearly as mobbed as it was for last month’s concert by Thee Oh Sees. Magic Key was the more intense of the two acts, with Aleks Tomaszewska showing some strong passion and daring in her vocals. (If Aleks looks familiar, you may remember her from the Chicago duo Aleks and the Drummer. Magic Key’s her new band, although as she explained in the Tribune, the new, larger band has morphed back into just Aleks and “the Drummer,” Deric Criss.