Da`wah to Allah at coffee shops and clubs

Q 4: Some people go to cafes and clubs on the pretext of calling people to Allah. Is it Islamically permissible to go to places where vice prevails with the intention of spreading Islamic teachings among people who are obviously reluctant to abide by them?

A: If it is likely that there will be a good response on the part of the attendants, one should sit with them to guide them to the truth and advise them. Doing so fulfills the duty of conveying the Message of Islam, and thus leaving them no excuse for ignorance. (Part No. 3; Page No. 381) This is similar to the Messenger (peace be upon him) who used to frequent the gatherings of Mushriks (those who associate others with Allah in His Divinity or worship) to call them to Allah. If such people respond to the call positively, all praise be to Allah; otherwise, one should keep away from them so as to avoid their evil.