THEME:   first word of a term is the name of a beach   
GOOD ONES:     Shindig by the shore {& theme}   BEACH PARTY [wonder how many beach party goers use or even know the term shindig]      
BTW:   There are two root beers (HIRES, DADS) and two horns (Horn of Africa, Around-the-horn) today.      
Narcissistic indulgence   EGO TRIP [I never liked the term since it can be and is leveled at anyone who distinguishes himself: President, ballarina, tenor, stripper…]      
Uncertain responses   HOOHA [my knowledge of grunt semantics is admittedly limited, but perhaps this word I never saw comes from brouhaha]      
Huge mess   SNAFU [from WWII: "situation normal: all fucked-up"]      
Submissions to eds.   MSS [manuscripts aren't hand-written any longer, but to my knowledge we haven't come up with a good replacement; SCS for submitted copies?]      
RATING: 
 
   Three grins = Loved it; Two grins = Enjoyed it; One grin = A bit bland for my taste; One teardrop = Not much fun