If I was the PM, I will try to find a time that members can meet in two different sessions to speed up the process. Also, an online meeting through Google hangout or skype would be appropriate. Another solution could be to record a video with people who can meet in-person, and send it out to the those who missed it and ask them the comment back via video in which we can have a digitally controlled meeting.
Since we are in the modern era, where meeting requirements and methods did change a lot by current smart technology, it is much easier to communicate and discuss the project phases remotely. It would demand more time and effort and would waste the time for other team members, but in the end, it should work.