Is it obligatory for the da'wah worker to go to places where there is fitnah (trial, discord or temptation), tabarruj (a woman's display of her adornment), and ikhtilat (free mixing of men and women) to call non-Muslims to Islam?

Question:
Honorable Shaykh, may Allah grant you success. He says: Is it obligatory for the da'wah worker to go to places where there is fitnah (trial, discord or temptation), tabarruj (a woman's display of her adornment), and ikhtilat (free mixing of men and women), such as hospitals, to call non-Muslims to Islam, and is this to be done on a daily basis? Is this obligatory?

Answer:
This is good. The Messenger (peace and blessings be upon him) used to go to the gatherings of the mushrikin (those who associate partners with Allah) and recite the Qur'an and the da'wah to them. So if his intention is da'wah, he goes to these places, yes, with lowering the gaze and avoiding ikhtilat (free mixing of men and women), yes.