Are these dance music tunes 4/4?
www.youtube.com/watch?v=6iiK4MgIPtI

www.youtube.com/watch?v=RhHkUg-QCwk

www.youtube.com/watch?v=W5dcEXpViiI

www.youtube.com/watch?v=MBFXJw7n-fU
(dozers, do fuck off ur a nob m8, Sat 8 Oct 2011, 22:46, 1 reply, 15 years ago)

yes
yes
yes (probably, I think they're just playing semibreves, so the other 3 beats are there but unheard)
yes
( Citizen Cavy Admires your passion for conformity, Sat 8 Oct 2011, 22:52, Reply)

Those last two aren't played on a piano.
They are played on a disklavier, with a sequencer rather than keys responsible for controlling the movement. The inside was also miked up so that the hammers can be heard.
(dozers, do fuck off ur a nob m8, Sat 8 Oct 2011, 22:56, Reply)

*looks up disklavier*
interesting
( Citizen Cavy Admires your passion for conformity, Sat 8 Oct 2011, 23:09, Reply)

Indeed.
A modern version of those pianos controlled with a roll of paper. You know the ones I mean.
(dozers, do fuck off ur a nob m8, Sat 8 Oct 2011, 23:13, Reply)