Fighting pit

Fighting pits are establishments, usually huge arenas, where men and women, usually slaves, fight to the death against other pit fighters or wild animals in gladiatorial combat, for the entertainment of patrons.

History
The cities of Slaver's Bay are known for their fighting pits.

Season 5
During Daenerys Targaryen's liberation of Slaver's Bay, she defeats Yunkai and sets up a ruling council before marching on Meereen, where she establishes herself as Queen. The fighting pits are abolished along with slavery itself, as the pit fighters are all slaves. When the Wise Masters of Yunkai return to power and enslave all their freedmen, Daenerys sends a Great Master at her service, Hizdahr zo Loraq, to negotiate with the Wise Masters, and Daario Naharis and his Second Sons to serve as a threat. Eventually, they return successful from their mission: the Wise Masters will comply with her abolition of slavery and set up a ruling council of former slaveholders and freedman as long as she allows the fighting pits to be reopened, where now free men will fight free men. However, Daenerys cannot tolerate this condition, despite repeated appeals by Hizdahr and Daario.

In the books
In the A Song of Ice and Fire novels, there are several fighting pits in Slaver's Bay. The combatants wear no armor in the fighting pits as it is blood the crowds have come to see. Usually, fighting pits feature gladiators against gladiators, gladiators against beasts, or beast against beasts. But there are also pits in which slave children are forced to fight beasts, and "follies" in which children, cripples, dwarfs or old people are placed with mock weapons against wild animals for the mockery of onlookers. There are even pits in which slave children are covered in different foods so that patrons may bet on which child a given beast will devour first.