THE HEART OF a concert hall is people.

And when the vast space is dim and empty, as this one was at the moment, a venue can bristle with impatience, indifference.

Even hostility.

Okay, rein in that imagination, Kayleigh Towne told herself. Stop acting like a kid. Standing on the wide, scuffed stage of the Fresno Conference Center’s main hall, she surveyed the place once more, bringing her typically hypercritical eye to the task of preparing for Friday’s concert, considering and reconsidering lighting and stage movements and where the members of the band should stand and sit. Where best to walk out near, though not into, the crowd and touch hands and blow kisses. Where best acoustically to place the foldback speakers-the monitors that were pointed toward the band so they could hear themselves without echoes or distortion. Many performers now used earbuds for this; Kayleigh liked the immediacy of traditional foldbacks.