The Aristocratic Salon Era
In the eighteenth century, the drawing room was the filter. A hostess of standing decided who was invited, who was seated near whom, and which conversations were allowed to develop. Nobody arrived unannounced; an invitation was itself a verification, issued by a person whose own reputation depended on getting the guest list right.
The result was a closed, well-informed circle in which character and circumstance were known before any attachment formed. Introductions were slow, ceremonial and heavily supervised — but they were also remarkably safe, because everyone present had been accounted for by someone accountable.