THEME:   none, but the grid looks like a flaming I or a wild X, which reflects the numerous X's in this puzzle   
GOOD ONES:     Food often served in chains   PIZZA [had an image of a waiter in chains]   
Rhine whine   ACH      
BTW:   Entrance   BEWITCH [I thought doorway]      
Sex appeal   
HOTNESS [not a word in my lexicon, but HEAT is --- guess it's common useage among the illiterati]      
"Since I Don't Have You" is a great doo wop from my teens replete with personification --- wonder how it sounds to today's kids --- pobably too much melody, so it's sappy.      
RATING:    
 
Three grins = Loved it; Two grins = Enjoyed it; One grin = A bit bland for my taste; One teardrop = Not much fun