oop as the sender, via one or more meeting objects &rsquo;m0 m1 ...&rsquo;.  If
no receiver is waiting for the datum, this procedure waits until a
receiver calls meeting-receive on one of the meeting objects to
request the datum.  If a receiver is already waiting, this procedure
passes on the datum and returns immediately.
</p>
<p>The &rsquo;loop&rsquo; argument is optional.  If not supplied, or #f is passed,
this procedure will use the default event loop.  It is an error if
this procedure is given a differ