Glazes with alcohol in them contain absolute trace amounts of it. Jack Daniels glaze in particular, as mentioned in the episode, contains no alcohol at all. Floyd could drink an entire bottle of such a glaze and not get even slightly tipsy.
When Jenna says, "Now I never want to go to sleep," Tracy says, "Just like this amazing city we live in," talking about New York (the city that never sleeps). However, Tracy Jordan doesn't actually live in New York; he lives in New Jersey.