The Prince
The Prince is the ruler of the domain and the judge of all its affairs. Their power is only limited by the consensus of the entirety of the Primogen or the words of the Methuselahs, though none of the above would ever make such a move in public.
Whenever the Prince enters a room
Elders will stand.
Ancillae will stand and bow.
All others will kneel. (If you cannot get up or kneel for off-game reasons, remain in place and bow your head.)
Everyone will remain in position until the Prince is seated or indicates that everyone can continue.
Whenever the Prince raises their voice
All conversations will cease immediately.
Anyone will speak respectfully and only when spoken to.
Everyone except the Methuselahs is expected to obey on pain of punishment.
The Seneschal, Harley, or the Sheriff, Endymion, may speak in the name of the Prince, when carrying out an order or when the Prince is not present.
The Host
Whereas the Prince is the ruler of the domain, the host of the salon has sole purview over the activities therein, except for breaches of Tradition.
Otherwise the same points of etiquette apply to the host as they do to the Prince.
When having issues with anything at the salon, Kindred will not approach the the host directly, especially not with any small matters, but speak to their herald, who is doing all the actual moment-to-moment work, while the host represents the big picture side of things.
High-status Kindred
This applies regardless of their status, as long as they are of higher rank than you it is common courtesy to
Ask them for permission to enter into a conversation or leave one.
Not speak over them.
Offer them a chair, hold open doors, pour them a drink or otherwise accommodate them.
Be polite and respectful even in disagreement.
It is safe to say, the higher the difference in rank, the greater the show of deference should be. To see where you fall in relation to others, the levels of status from highest to lowest are
Methuselah
The Prince
Elders of Primogen Status
Elders holding office or leading coteries
Elders
Ancillae coterie leaders
Ancillae
Neonate coterie leaders
Neonates
Ghouls
The ghoul officers of the court, the Seneschal Harley and the Herald Britt, are respected for their service, their great age (rivaling Elders) and their backing by the Prince, and should be treated as if they were high-ranking Kindred, approximately of level 4 but below Kindred on that level.
Whips
Elders (or ranking Elders in a clan that has several) may choose a Whip to represent them to others of their blood or to carry out duties for them. While this may put additional burdens on the chosen Kindred, it is also a boost in status and authority.
A Whip should be an Ancilla in good standing of the same clan. Choosing a Whip for the salon will be one of the talking points during the clan meeting preludes.
Harpies
In a dispute between two Kinded, the one of higher status will usually be the one whose testimony is believed or who is favoured by people in power. For example, an Elder will reflexively take the word of an Ancilla over that of a Neonate, no matter the facts, unless there are other extremely important circumstances.
While this seems simple, it becomes more complex, when people of similar status are concerned. No Kindred is ever equal to another. There's always a hierarchy.
For example, two neonates or even two elders are equal in rank but not alike in dignity. Their behaviour, their allies, their protection by those in power, all that comes into play. These factors must be carefully weighed in a dispute, so a pronouncement can be made.
That's were the Harpies come in. They are the arbiters of all social matters. While they have no legal authority in Kindred society, it is common to seek the counsel of harpies on matters of proper behaviour. In the City, the Sound and Fury coterie fulfil this function. While not everyone may like that fact, everyone who wants to be someone uses their services.
The Harpies will usually resolve the dispute through some form of sanction. It's a judgement call and they have great leeway, though they should be careful not to overstep their bounds. Normally it all comes down to prestation (see below).
For example, a higher-ranking Kindred may have taken offence at insolence by a subordinate. The Harpies might decree they should be paid a Major Boon in recompense to let the matter slide, otherwise they may punish the offending party publicly.
Another issue they may be called to weigh in on would be appraisal of debts, deciding if something constituted a Major Boon or a Blood Boon for example, or if a form of repayment offered was sufficient to satisfy an outstanding debt.