"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.
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.
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.
Early when Violet arrives at the bar, one Cayote pours some spirt along the edge of the bar, then someone sets the liquor on fire. Spirits need to be 100 proof or higher to even light, and then alcohol burns blue not a yellow flame like indicated in the film. Also it wasn't poured completely accross the width of the bar as the flames started. Most common bar spirits are 80 proof or lower.