Socialator
From Battlestar Wiki, the free, open content Battlestar Galactica encyclopedia and episode guide
A socialator is a 4,000 yahren old profession sanctified by the "elders," wherein a person obliges the desires of others. In other words, it's a euphemism for prostitute or "space hooker."
Cassiopeia was a socialator prior to the Cylon sneak attack on the Colonies (Saga of a Star World).