Melee would be interesting too. Guns is trickier since everyone don't have access to a gun range (Although I would love to do a library like that, preferably in the spring/summer when more activity is available here up north)
In a melee libray we could have:
Punches, kicks, punching bags, meat, leather, vegetables etc
Foley, like body falls, swishes, cloth and armor movements
Voices, like grunting/effort sets.