Just Another Saturday Night was first published in Sin City #1/2 (August 1997), a limited mail-in comic available only through a special offer in Wizard #73. It was later reprinted in a mass-market edition as Just Another Saturday Night (October 1998).
Plot
It is the story of what Marv was up to on the night John Hartigan met back up with Nancy (from That Yellow Bastard). Marv regains consciousness on a highway overlooking the Projects, surrounded by dead young guys, unable to remember how he got there. He lights one of the dead guys' cigarettes and thinks back; since it is Saturday, he deduces he must have been at Kadie's watching Nancy dance...
Marv was rather depressed after seeing Nancy leave with Hartigan, as he'd always had an unrequited crush on her, so the barkeep gives him a bottle to drown his sorrow with. He gets drunk and steps outside, only to find some preppy college kids trying to burn drunks and winos to death. He immediately kills one of them and chases the rest to The Projects, where along the way he destroys a police patrol car and hijacks another vehicle. At the Projects, it is clear that they are being watched, but Marv uses hand signals to identify himself and instruct his former neighbors to attack the men and they do so by firing arrows at them and providing Marv with a knife and Leo unfortunately by hanging on of them by the neck with a rope. After questioning the last surviving kid about him being called 'Bernini boy', (it was the name of the brand of coat he was wearing,) he slits his throat. This done, he muses, "And one fine coat it is. Somebody must've spent a fortune on it. I wonder who?" But he cannot seem to remember where he got the coat or gloves.
Film adaptation
Just Another Saturday Night serves as the opening of 2014's Sin City: A Dame To Kill For. Mickey Rourke portrays Marv and Jessica Alba portrays Nancy.