Some songs have been playing in the background of your life so long you forgot an actual person wrote them. 'All Out of Love,' 'Lost in Love,' 'Making Love Out of Nothing at All' -- Air Supply has been the sound of slow dances and long drives since 1975, and Russell Hitchcock's tenor has somehow refused to age out of the stratosphere. Fifty years in, the duo still plays these songs like they mean them, which is the whole trick. On an early-October evening at Pechanga it is a short drive from anywhere in the valley for a night built entirely out of songs you already know every word to, whether you admit it or not. Bring the person you have been slow-dancing with for years, or the friend who will belt every chorus with zero shame. Some choruses were made to be sung too loud.