How To Create and Join Google Spaces As A Page

Google just launched Google Spaces (Official Site) as a new social / messaging app. I am not sure what Google is trying to do to compete with Slack, Twitter or Facebook Group, but it is definitely confusing a lot of people like me, who is actively on Google+ Collection and Community.

Google has failed many times trying to compete with Facebook and Twitter as a social media power house, but it doesn't seem to work. Anyway, what is interesting about the spaces is that people will be invited to join conversations. This can be useful for a business to invite their customer to join semi-private conversation. As long as you have the invitation link, anyone can join the spaces.

The question is how can a business join and create a space?