Open Meetings have a speaker with a background in invention or entrepreneurship. As of now, these meetings are online-only, but will be an online/physical mix once Covid19 blows over.
Online Meetings are a lot like Open Meetings, except they always require a paid ticket. Unlike Open Meetings, Online Meetings are never held at a physical location.
Workshops are for members only. They require paid membership dues and members discuss their inventions under a blanket NDA. This is an amazing way to get a LOT of input on your invention and meet people who can take your idea to the next level.