Out of the ones you've listed, the only one I would avoid is the Panasonic, because its lens goes down to 3.3 and the others appear to be 2.8 - the lower the number, the more light it lets in and the easier it will be to shoot in low light (although this is probably stuff you already know). All appear to have ISOs that go to at least 800 - this is the area where you need to read the reviews about noise performance. Many cameras have ISO settings that produce a great deal of noise when used at the higher numbers - meaning that although you may capture an image without blur, its noise (or digital grain) will make for a rather dismal image.
All point & shoot digi cameras have shutter delay, so the trick with dancing shots is getting to know your camera - including how long the delay is - so that you can anticipate when to press the shutter to get the shot you want. You can also manually set most cameras to 'Aperture' mode, set at 2.8 (or the lowest aperture possible) and see what shutter speed you can get with that (depending on the ISO - again, you may want to manually set this rather than let the camera set it). If you practise waiting until the end of a phrase or for a break, the couples will also be at their most still, so you have the best chance of getting a non-blurry photograph - unless that's what you want.
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