drown night
n.— «Tulagi’s, a saloon of some note in those years, initially booked Flash Cadillac for a “drown night,” allowing students to drink unlimited amounts of beer for $1.75.» —“Flash Cadillac Still Majors in Fun” by Ellen Miller in Woodland Park, Colo. AP Oct. 10, 1989. (source: Double-Tongued Dictionary)