Would it be permissible for me to go out for lunch/dinner with a person of the opposite gender?

The permissibility of going out for lunch or dinner with a person of the opposite gender is a matter of some debate among scholars, and both Sunni and Shia perspectives provide guidance on this issue.

According to Sunni scholarship, as reflected in Tafsir Ibn Kathir, it is important to maintain appropriate boundaries and etiquettes in interactions between men and women. In Surah Al-Ahzaab, Allah instructs believers: O Ye who believe! Enter not the dwellings of the Prophet for a meal without waiting for the proper time, unless permission be granted you. But if ye are invited, enter, and, when your meal is ended, then disperse. Linger not for conversation. Lo! that would cause annoyance to the Prophet, and he would be shy of (asking) you (to go); but Allah is not shy of the truth. And when ye ask of them (the wives of the Prophet) anything, ask it of them from behind a curtain. That is purer for your hearts and for their hearts. And it is not for you to cause annoyance to the messenger of Allah, nor that ye should ever marry his wives after him. Lo! that in Allah's sight would be an enormity. 33:53 This verse emphasizes the importance of maintaining decorum and avoiding situations that could lead to inappropriate interactions.

Additionally, the Prophet ﷺ said: If a woman among you asks permission (to go out), do not forbid her. Sahih al-Bukhari 10:264SunniSAHIH This hadith reflects the allowance for women to go out, suggesting that as long as proper conduct and intentions are upheld, going out with someone of the opposite gender may be permissible.

On the other hand, Shia scholarship, as reflected in Majma al-Bayan, emphasizes the importance of modesty and appropriate conduct in interactions between genders. While specific commentary on the exact verse for this question may not be available, the general principles of conduct and boundaries in relationships are stressed.

Overall, while there is a degree of flexibility in the ruling, it is essential to consider the context, intentions, and the nature of the interaction. It is advisable to consult a qualified local scholar for a ruling that applies to your specific situation.