As-Salamu `Alaykum. I have a question related to requirements for a prayer space. At some universities, they are not able to offer students a Musalla (prayer room) only for Muslims, but instead want to provide an interfaith prayer room, which means other religious groups could use it during the day.What requirements should we have for such an arrangement? I was thinking that the place should be clean, with no alcohol at any time, no images, and no religious symbols (crosses, crucifixes, stars, etc). Are these correct requirements, or are there others?Also, is it okay if they have a cross that would be covered by a curtain when we pray? Inshaa'Allah, your response will benefit many students at many universities. May Allah reward you!