Is it permissible to eat food offered by actors and riba-based banks?
Question

                In our country there are some riba-based banks that set up tents to offer iftaar to people who are fasting. Is it permissible to eat this food?.
Praise be to Allah.
    In some countries it is very common for food to be offered in 
    Ramadan; this is done by some charitable organisations and people who are 
    known for their religious commitment and righteousness, or by some business 
    people who we think are good people. In these cases, there is nothing wrong 
    with the Muslim eating from that food, and we ask Allah to decree a great 
    reward for those who do that. 

    It is also very common for some actors, dancers and others 
    whose work and earnings are haraam, and some riba-based organizations such 
    as banks, to offer food in this manner. 

    This kind of food should be shunned and one should not eat 
    from it. This is the least that the Muslim can do to denounce the evil 
    actions of those people and to rebuke them for their haraam and 
    reprehensible actions. 

    It is not befitting for the fasting Muslim to be the guest of 
    a female dancer or actress, or a thief who is well known for stealing and 
    embezzling the public wealth, and to eat iftaar at their tables. 

    It is also inappropriate to be the guest of those against 
    whom Allah, may He be exalted, has declared war, namely the riba-based banks 
    which openly commit that which is even more haraam than dancing and acting. 

    It is no secret that these people are trying to draw close to 
    ordinary people by means of these actions and to become more famous. 
    Otherwise, if they really wanted to do good, they would give up the evil 
    actions and haraam deeds that they are doing. That is the best thing that 
    they could do for themselves. And Allah is Good and does not accept anything 
    but that which is good (or halaal). 

    This food that is offered by the riba-based banks should not 
    be partaken of for another reason, which is that offering this food is 
    nothing more than an advertisement for this riba-based bank, so it is not 
    permissible for the Muslim to partake of it. 

    The scholars have forbidden advertisements for riba-based 
    banks that are more low-key than this. 

    The scholars of the Standing Committee for Issuing Fatwas 
    were asked: 

    Is it permissible to put up Ramadan timetables produced by 
    some banks in the mosques, or not? 

    They replied: 

    It is not permissible to put up Ramadan timetables produced 
    by some banks or other businesses in the mosques, because that is something 
    concerning which there are shar‘i reservations, like advertising haraam 
    transactions, making the houses of Allah places to promote and advertise 
    commercial products, and other things that are contrary to the sanctity of 
    the mosques… End quote. 

    Shaykh ‘Abd al-‘Azeez ibn Baaz, Shaykh ‘Abd al-‘Azeez al 
    al-Shaykh, Shaykh ‘Abd-Allah ibn Ghadyaan, Shaykh Saalih al-Fawzaan, Shaykh 
    Bakr Abu Zayd 

    Fataawa al-Lajnah al-Daa’imah, 
    vol. 2, 5/239-240 

    And Allah knows best.