A Muslim should always adhere to the teachings of his religion. Dealing and working with non-Muslims should not be a reason for infringing the limits prescribed by Almighty Allah. A Muslim may cooperate with non-Muslims, but this should not be at the expense of his principles and should not put his morals at risk.
To shed more light on this, Dr. Ibrahim Dremali, stated:
Almighty Allah has preferred this Ummah to others for many reasons, on top of which is proclaiming kind acts and forbidding detestable acts. Almighty Allah says: (You are the best nation raised up for (the benefit of) mankind; you enjoin what is right and forbid the wrong and believe in Allah.) (Aal`Imran 3: 110)
Muslims who are involved in such companies should be proud of their principles and should apply them in their behavior and dealings with others. Doing so will raise their status and honor their reputation among people.
Just sitting at a table where liquor is served, even if the Muslim does not drink any liquor, is in itself an act of disobedience. Almighty Allah has ordered us not to sit in places where disobedience is taking place, otherwise we would be considered as committing sins. Almighty Allah says: (And indeed He has revealed to you in the Book that when you hear the signs of Allah disbelieved in and mocked at, do not sit with them until they enter into some other discourse; surely then you would be like them; surely Allah will gather together the hypocrites and the unbelievers all in Hell.) (An-Nisaa’4:140)
Also, He, the Almighty says: (And when you see those who engaged in vain discourse about Our signs, turn away from them until they enter into some other discourse; and if the Satan causes you to forget, then do not sit after recollection with the unjust people.) (Al-An`am 6:68)
The Prophet, (peace and blessings be upon him) said: “Whoever sees a wrong act should change it by his hand; if he could not, by his tongue, and if he could not, then by his heart which is the weakest level of faith.” (Muslim)
If the heart disavows an act, it becomes sad and averse to such hateful acts. This is an obligation on all Muslims in all circumstances and they are not excused for abandoning it, because there is no master over the heart. Attending meetings where such sinful acts are practiced contradicts this obligation.
Sheikh Al-Islam, Ibn Taymiyyah said:
The believer has to fear Allah in his dealings with people, and has nothing to do with their guidance. This is the meaning of Allah’s saying: (O you who believe! Guard your own souls: he who goes astray cannot hurt you if you are rightly guided.) (Al-Ma’idah5: 105). Guidance is achieved by fulfilling obligations. If a Muslim does what he should do in proclaiming goodness and preventing evil acts as he does his other obligations, he will not be harmed by the intrigue of disbeliever. This is sometimes done by the heart and sometimes by the tongue. The heart should be continually doing this because there is no harm in doing so, and whoever does not do it, is not considered a believer, as the Prophet (peace and blessings be upon him) said: “And this is the least or weakest level of faith.” (Majmu` Al-Fatawa, 28/127)
The Prophet (peace and blessings be upon him) ordered that no Muslim should sit at a table on which wine is served. `Umar bn Al-Khattab (may Allah be pleased with him) narrated that the Prophet (peace and blessings be upon him) said: “Whoever believes in Allah and in the Day of Judgment must not sit at a table at which wine is served.” (Ahmad)