It depends on concentration. If the concentration is low enough, then the alcohol will exit your system in the same sweat that keeps you cooled down, and the same pee that gets rid of other stuff (pee is rarely saturated).
It's only when you drink enough alcohol that you start sweating/peeing specifically to get rid of alcohol that you get diuretic effects.
It's only when you drink enough alcohol that you start sweating/peeing specifically to get rid of alcohol that you get diuretic effects.