Males praying behind females because the room is small
Question

                we are having a little problem at our college. Because of the small prayer room that is given to us by our college, muslim brothers and sisters are praying  in the same row (I'm not talking about Congregation)  Some Muslim men are praying even behind our sisters.  Is this acceptable??
Praise be to Allah.You have 
          to try to keep the women separate from the men, even if the prayer-room 
          is small. All the people – men and women – should know that the back 
          of the room is only for women. You could put up some kind of barrier 
          to define the space that is for women, even if it is only a line of 
          the floor, or a marker, or something like that, so that there will be 
          enough room for the men who come late to stand behind their brothers 
          who came earlier, and in front of the women who are praying. And Allaah 
          knows best.