If you pass all the speech checks (45 Speech for all three) with Swank before facing off with Benny, you can get all your weapons into the Tops. There is just one catch: the Tops Presidential Suite is not a secure location, anything you store there can and will be stolen by the Chairmen guards patrolling the hallway nearby.
next playthrough i'll try that, i notice the guys inside the casinos respawn so its not possible to take over a casino too bad, it would be kinda fun. but it is astonishing, it does have the tops and i'm pretty sure the ultra lux listed as official housing yet you can't really store your weapons in the room, thats part of the fun.