Calathi was the name of the bartender working in the Green Dystopia, one of the barrooms of Quarek'k, which was a large bar complex located on Coruscant shortly after the rise of the Galactic Empire.
In 19 BBY, the bounty hunter Aurra Sing was directed to Calathi by the Crimson Redrum's bartender while looking for information regarding the former Jedi Jax Pavan.