Has anyone ever worked directly with or know someone who has worked with ET Global?

Calling all event design wizards! I’m looking to create a networking lounge in a large hall for a conference in February in Austin. The client wants to create some separation between the lounge and the rest of the space but does NOT like hedge walls or pipe and drape. I have a few divider wall options, and have also talked about using plants (but for the size of the space we are going to need a LOT of plants) - has anyone used other things to act as space dividers/create separation in spaces?