You could use virtual websites like gotomeeting. I have used go to meeting. You call in on the phone and use the internet for a presentation. You might want to check into that option. Here are some links:
You could also put people on speaker phone or use skype. You could also have a conference call. My cell phone allows you to conference in sevel people. I would probably just have several cell phones and use speaker. I hope this answers your question. If not, then please reply. Thank you.
Almost everyone has a cell phone these days. I would just have them call in and put it on speaker phone. It would require numerous cell phones at the meeting. However, you would could probably get class members at the meeting with a cell phone to call a friend. You could then get all the phones on speaker phone. Another suggest would be to use facebook. Our class reunion schedule was posted on facebook. It may work better. Then everyone could comment and give suggestions. I hope this answers your question. If not, then please reply. Thanks.