As they enter the bank, Lorelai says to Emily: "I swear, one of these days, Alice. Pow! Right in the kisser!", to which Emily responds: "Who's Alice?"
The answer, of course, is Alice Kramden (played by Audrey Meadows), the wife of bus driver Ralph Kramden (Jackie Gleason) on the popular 1950s sitcom "The Honeymooners". Ralph used to issue that empty threat when he became frustrated during arguments with Alice, although he never really followed through on his bluster.