The colosseum of the city. Co-owned by several MerchantHouses, Gladiator-patrons and Houses of the city.
This is where slaves sometimes are sent to be punished by death (and for entertainment) or where slaves may live a life with some semblance of freedom.
The most popular gladiators and gladiatrixes often have semi-official fanclubs or receive guests (who all wish to be anonymous) for an intimate time with the hero of the day.
Some drow also participate of their free will. All under assumed identities of course. Just like those who frequent brothels in LoveTown, the drow who fight in the arena wear masks. Of course in some cases the true identity may be quite obvious, but it is extremely impolite to ask or tell.