All perfect praise be to Allah, The Lord of the Worlds. I testify that there is none worthy of worship except Allah, and that Muhammad is His slave and Messenger.
It is confirmed that the Prophet said: “Whoever believes in Allah and the Last Day should not sit at a table where alcohol [or any other kind of intoxicant] is being served.” [Ahmad, At-Tirmithi and An-Nassaa’i]
Therefore, dear Brother, you should stay away from such gatherings. Indeed, you may present excuses and organize work gatherings at other places as to abide by the orders of Allah and His Messenger and to protect yourself from seeing evil and not hating it in your heart. This might lead to getting accustomed to it and becoming ill-minded, not being able to differentiate between what is good and what is bad.
May Allah guide us and you to the right path and protect us from falling in sinful acts.
Allah knows best.