Gangster Squad assembles all the old cliches to little effect

 

Post-war L.A. The glitzy and glamorous City of Angels is under the thrall of brutal mob boss Mickey Cohen, with mob slayings on every corner and half the police force on the make.

Or so Gangster Squad, the third feature of director Ruben Fleischer (Zombieland, 30 Minutes or Less), would have us believe.…