Frequently in airports and in other place you can find "Interfaith Prayer Chapels". Is it permitted to daven in them? They're not churches, they're completely neutral rooms and are described as welcoming all religions. Is there a problem praying in the same room as a non-Jew, even if we are not praying together?
I found this answer provided by Rabbi Baruch Rubanowitz from the Institute for Dayanim:
What is relevant to our discussion seems to be:
The linked answer above is very thorough and I suggest anyone who wishes to comment on this post or gain a better understanding of the underlying issues and how the author reached his conclusions read it first.
Additionally I would venture that there are those who are ready to comment saying that the author has adopted several stringent views and there are other rishonim/poskim who viewed Islam/Christianity more leniently. While that is true, however that would only make praying in a Interfaith Prayer Chapel more acceptable not less.