Forget the pitch. Forget workspace. Talk to people like they're human beings. Talk about yourself and your wants and hopes and needs and invite people to share theirs.
This movement isn't special because we found a new way to rent office space. This movement is special because work has changed and now a lot of us are on our own cooped up in our homes and it's kind of awesome but it kind of sucks. Speak from the heart about what you believe– and why you care about this so much that you're sticking your neck out to build a business around it.
People respond when they see that you want what they want and you're dedicated to doing something about it.
When they offer to help, let them.
Then, when you have a living room / cafe / library / public space / restaurant / bar buzzing with a small but excited crew of people who are so glad they found each other, the pitch starts to pitch itself. People who witness it will get it.
As you go, talking about what you're doing starts to get easier as you build momentum and support. Invite people who care about the things you care about to gather around helping each other, and you should have no problem reaching the people you want to reach and feeling good about what you're doing as you go.
Tony