Can you clarify if you have a specific need to have participants on individual laptops in the same room? Is video a consideration here?
Without knowing more, what I would suggest if each individual needs to be in front of their computer (you have not way to display the Webex meeting on a larger screen?) would be to have all users join the meeting but only ONE user join for audio and then obtain a USB speaker/mic like one of the following to connect to that user's computer. These are designed for conference rooms:
Jabra 810 (15 person room)
Jabra 710 (6 person room)
Poly Sync 40 (small/medium rooms)
Poly Sync 60 (larger rooms)