Oooh. Tough one.
Probably the club scene from the first (and only) John Wick film.
I love the choreography in
John Wick, the fighting and gunplay is like watching poetry. I really like the club scene because it has cool music, lots of neon and lots of stylish violence.
Mature content warning
Also I need to mention this scene from
Underworld. It isn't really an action scene, it's just stylish and cool and really dumb.