@hamburger,
If you look at hbg pic can you tell apart the party of the fat cats from the party of the workers?
The speaker in the pic at the Despatch Box will, when he has sat down, be answered by his oppo opposite him. When this happens the camera shows him full frontal and the lady in the pale blue or green frock behind him gets a chance to cross and recross her legs which it is accepted practice for her to grab.
But lest you have the wrong impression the pic shows a "high" occasion. Normally it is similar to what was earlier described as happening in your chambers.
I think the reasons they have high ceilings is to symbolise their sense of self.
Most of them are sexually depraved judging by the ones who have been caught.