Spaces are simply a place to talk about whatever that space is dedicated to, localized discussions that can be followed or unfollowed to show on your feed or not.
If you want to place ads, use the hashtags #ads etc. Click channels at the top of every page to see some popular ones. Just write an update right in your own profile, and the use of hashtags will distribute it across the site to everyone following that hashtag.
So if I understand how all this works ladies will post letting others know when and where they may be hosting. That will tag their post with a hashtag or more. such as "#Cincinnatigfe" I am supposed to know they have done so and look for specific hashtags to see if someone has posted recently. Or I can try to "friend" all the ladies I might wan to meet and then wait for them to reach out to me. Close?