189: On a huge ship, as it's slowly sinking. Think about the possibilities: Slowly rising water, panicking passengers struggling to get off, doors bursting open and spilling a wall of water into the room. At some point, the ship breaks in half, and everything suddenly shifts 90 degrees. Watch 'Titanic' for inspiration.
190: A printing press. Woodchippers, conveyor belts, tanks of water, barrels of printing chemicals that are actually highly explosive (no, really) and huge rolls of paper that just have to break free at some point and roll menacingly towards the fighters.
191: Further to the church idea, the bride and groom are actually members of rival crime families, whose marriage was supposed to close the rift. When the combatants show up, both families assume the other has double-crossed them, and a massive melee breaks out.
192: A museum. A party of panicking schoolchildren to not injure, a priceless vase which comically keeps almost getting destroyed, and dozens of improvised weapons--everything from a Roman gladius to the tooth of the T-Rex skeleton you just knocked down.
193: A train, fighting from wagon to wagon (think 'Indiana Jones and the Last Crusade' & 'Broken Arrow')
194: An old folks home. "Our residents--" BLAM "--are trying--" BLAM "--to sleep!" And at least one of the old people should turn out to be an ex-soldier who is suprisingly good at fighting still, and suffers a flashback to a war. It also happens that he kept one of his old weapons....for sentimental value, y'know?
195: A nudist colony. Don't ask where they concealed those weapons.....
196: Actually on a large aeroplane, in flight. Be careful with those guns, or you might depressurise the whole thing! Also, the life-rafts, parachutes and trolleys can be used for entertaining stunts. Lots of innocent civilians cowering around. Plus, not only are there several dangerous, highly cranky animals being carried in the cargo hold (Must be illegal species smuggling. Yeah, that's it.), but there are several hijackers on board who were going to take the plane to Cuba, but who panic when another fight breaks out. At some point, at least one person should get sucked out the plane.