Bachelorparty

7 clues
Pre-wedding bash
Pre-wedding ritual
Men only get-together
Final fling of a sort
Future benedict's last hurrah
Prewedding activity, for some
Pre-wedding activity, for some
Similar answers:
Bachelor
Bachelorette
Bachelorfatherknowsbest
Bachelorflat
Bachelorflattop
Bacheloripad
Bachelorofparts
Bachelorpad
Bachelorparties
Bachelorparty
Bachelors
Bachelorsbutton
Bachelorsdegree
Dadchelorparty
Knightbachelors
Laborparty