The Gambling Den is a dilapidated hardware store (dubbed Discount Hardware in-game) which is used as backroom gaming place in Grand Theft Auto IV.
Located on Dillon Street, in Schottler, it makes it first appearance during "It's Your Call" where Roman asks Niko to accompany him in a card game which he is using money which is meant to be given to his Albanian loan sharks. The store makes a second appearance during "Roman's Holiday" in The Lost and Damned. This is if the player choose to go to the store instead of calling Roman to speed up the mission.
During free roam, Roman may ask Niko to pick him up from here during one of the friend activities.
The only means of access in GTA IV, is the time in between the two missions The Cousins Bellic, and It's Your Call. It is accessible in It's Your Call, though to do this, the player would have to follow the Albanians in resulting in mission failure, as with most interiors that are fully accessible in multiplayer in GTA IV, and its DLCs. After completing It's Your Call, the gambling den will be inaccessible for the rest of the original game.
- During the mission "It's Your Call", Roman escapes through the back door. This is strange as the store has a back door on its exterior, but not on its interior.