THEME:   none, but 28 blocks   
GOOD ONES:     They may hook you up, briefly   RNS   
Added a little to the pot   ANTED   
Took in takeout   ATE   
Events after shootings   WRAP PARTIES   
Sweeps the set   PANS [goes with movies clue above]   
Start to date?   PRE   
Cavity opening?   NASAL   
Pump house?   SHOE STORE   
Hold on a mat   NELSON [not the verb but the noun]      
BTW:   Zoom   HOT ROD [not the noun but the verb]      
It's uncomfortable to be on it   EDGE [needs "often" since being on the edge of victory is comfortable]      
Otherwordly greeting   NANU NANU [amazing how that has lasted in our collective consciousnesses: see below]      
"That's ____!": "Funny"   A RIOT  [awkward clue; I'd go with "You're ___, Alice!"]         
RATING: 
 
 
   Three grins = Loved it; Two grins = Enjoyed it; One grin = A bit bland for my taste; One teardrop = Not much fun