So - in our OMM lab at TCOM in 2006-2008, we had 2 Muslim females that were covered with the exception of the wrists and face -- they were always partnered together and it wasn't a big deal. You get all kinds -- we had the generic, no worries crowd, the crowd who had to be told to put on underwear underneath their OMM shorts, the crowd who were gym rats/runners, the crowd who wore spandex tights, and the crowd who were well-upholstered and difficult to palpate anyway. The OMM department was rather accommodating. Just ask.
Don't build it up in your mind -- after about the first 1 or 2 sessions you realize that body parts are body parts, it's clinical, not sexual, attractive classmates are just that but no one (usually) is model beautiful.