You have to import energy into the room somehow. Solar and wind are out?
Shake flashlights aren't a great source of electricity, unless you really have stamina. The bigger ones can produce almost a quarter watt once you get them going. Mine uses a NiMH battery to store the power till I need it. Figure 200 shakers to run a small 50 watt television (100 people). Is it a small room?
I've seen bicycles and treadmills hooked up to generators. They claim up to 100 watts if you're iin good shape. But that's hardly enough to supply one outlet, let alone 4 or 5.