Lyndiloo You are quite right about the universal response to pleasure and enjoyment.
The point you are missing, together with most people who are saying the Students' decision is silly, is that the Manchester University SU is only banning it for meetings and discussions where people are speaking and debating and where the audience were inclined to but-in with whoops and claps of agreement/disagreement etc à la House of Commons, which prevented others from hearing what was being said, especially those with hearing disorders who just gave up and stayed away instead.
I repeat Sara Khan's words:
""I think a lot of the time, even in Parliamentary debates, I've seen that clapping, whooping, talking over each other, loud noises, encourages an atmosphere that is not as respectful as it could be,"
They have not banned clapping in Theatres*
The ban is very specific concerning when it is in place
and
nobody will be prevented from showing pleasure by clapping at a Theatrical production.
You and many others, including the opinionated and too arrogant people in the media, would do well to humble yourselves enough to look at the facts before you start ganging up and showing off how pompous and "cleverly" outraged you can be in berating decent people. Get your facts right first!