"Coyote ugly" refers to waking up after a one-night stand and discovering that the person beside you is so ugly that you would gladly gnaw off any limb they are sleeping on, just to get away without being discovered.
Kevin Smith revealed on the Dogma (1999) commentary track that he did uncredited work on the script. He has also said that the one story element of this movie that most would believe could be attributed to him (Adam Garcia's character being into comic books) wasn't his idea at all.
Izabella Miko who played the bartender named Cammie was not yet 21 when the film was released which is the legal drinking age in the U.S. Most bars make it a rule to only hire bartenders that are of the legal drinking age. She is seen drinking a few times in the film.
The bands in the ad for the "songwriter showdown" are: The Skank Honkies, Papa Vegas, The Suicide Machines, Vertical Horizon, Eve 6, Verbena, Edwin McCain, Beth Hart, Excel, The Pietasters, Joy Drop, Bis Train, and Pennywise. The ad also mentions: Violet Sanford, My Scarlet Life, and Kottonmouth King the next week.