I was on flight one time and FA continued to serve female pax in exit row. I guess I saw pax drink about 6 beers, to point she was standing up, singing, starting taking her top off. I was across aisle. I tend to take the exit row stuff seriously and there was no way in the world she could "follow commands, issue instructions" in her state. I was disappointed in FA for continuing to serve someone they had delegated responsibilities to.