Do you have thousands of enemies and wish you can murder them over and over again without repercussion? Come to the Killhouse!
The killhouse is located in Cypress Flats/Popular Street. Find the Red Skull icon on the mini-map. Here you can practice your combat skills with other players.
You can choose to play in First Person or Third Person mode. There are separate killhouses for both modes.
For every player you kill, you gain $3500 and the dying player loses $3500 and vice versa.
To leave the Killhouse, type /exit.
Killhouse is shown in the map with the following icon: 
