Etiquette, like fashion, varies with each generation and with circumstances. But while the forms vary, the underlying principles of consideration for the comfort, privacy, convenience,sensibilities and happiness of others, even at the expense of one's own, remain constant.
In Scottish Country Dancing the following rules of etiquette are observed everywhere
1) Take your place at the end of the line as it is formed.
2) Do not form your set until the dance has been announced.
3) Do not dance with the same partner all evening,even if you are married to that partner
4) Men, escort your partner to her seat on completion of the dance
5) Having taken a place in a set, you should never desert it until the dance is finished.
6) Each Country dance, of course, begins and ends with a bow and curtsy