Mixing Pre-ops and post-ops together in PACU

How do you all feel about mixing pre-ops and post-ops in PACU? Is there an ASPAN standard for this? I looked in the 2008-10 book and couldn't find it. I work in a tiny 5-bed PACU and we have inconsistancy among our nurses allowing the OR team and docs to bring in pre-ops for their convienience all the while we have a phase I PACU pt recovering behind a curtian in the same room. Some don't see it as a big deal if you pull the curtain, others are more strict. My main question is what do the standards say? Should we allow it to happen in extreme cases(i.e. no where for the pre-op to sit and wait for OR.) Let me know your thoughts! Thanks!