All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad is His slave and Messenger.
It is religiously established that it is not permissible for a Muslim to go to a place where a sin or evil is taking place unless with the intention of stopping it and the like. Allaah Says (what means): {And it has already come down to you in the Book [i.e. the Quran] that when you hear the verses of Allaah [recited] they are denied [by them] and ridiculed; so do not sit with them until they enter into another conversation. Indeed, you would then be like them. Indeed, Allaah will gather the hypocrites and disbelievers in Hell all together.}[Quran 4:140]. Moreover, a Muslim does not know whether or not Allaah will inflict the sinners with His Punishment while he is with them, and so he dies with them. Allaah Says (what means): {And when We intend to destroy a city, We command its affluent but they defiantly disobey therein; so the word [i.e. deserved decree] comes into effect upon it, and We destroy it with [complete] destruction.}[Quran 17:16]. It is also confirmed that Zaynab Bint Jahsh inquired: "O Prophet of Allaah, will we be punished while there are pious and righteous people amongst us? The Prophet replied: ''Yes, when evil is widespread." [Al-Bukhari and Muslim]
Therefore, it is not permissible for you to work in this place where evil and Zina (fornication or adultery) take place at times. Allaah may compensate you with a better job; because when a person leaves something for the Sake of Allaah, Allaah will compensate him with something better.