What does halacha say regarding attending meetings that are held in the sanctuary of a church?

Since COVID my home meeting has been gathering in the sanctuary as it is the largest room in the building. I know all the tag line of "you didnt ask a rav when you acted out", which is why i am still attending as i dont have a choice... 
However, i would like to know if this is the right thing. If anyone has insight please share...

Thank you!

Dear fellow brother,
I appreciate your question. Hoping your query is no longer relevant, however there are great resources such as "Teshuva Through Recovery" written by Rabbi Dr. Abraham J Twersky, which discuss these and similar matters at length. Keep up your good work!