6 Weapons from the Crowd
This is fairly simple to do. The game says that you can have up to 4 weapons out at one time, but this is actually not true. You can have up to 6 weapons out at one time. The Ring Steps count as 2 weapons. You'll also notice that in areas where there no weapons already out, you can take up to 6 weapons out in the area. (See Weapons in Different Areas for those areas)
Ring Steps tend to get a bit boring however, so just pick them up and walk over to the crowd. Try to grab another weapon from the crowd while holding the steps. What happens is the steps go away and you end up with a different weapon from the crowd.
This also works with weapons you don't like. Simply take the crappy weapon (ex: microphone) and do the same steps.