Agreed but I know many pubs where there is a long distance between them and the pints are still good. But generally all pubs where the distance is short have good pints.
Also vibrations from the speakers would effect the lines in a nightclub/function room as well
That seems a bit odd to me.
.....the glasses and the temperature of the coolers would also have a bearing...
As long as Guinness comes in what I would call an ordinary glass then there is no problem.
Temperature of course has a bearing as has the gas level used for the taps.
I would like to do a thesis on this.