While FooEvents might work as required depending on the multi-vendor solution, it’s possible that you will experience difficulties. While the event products will most likely work in this setup, we can’t guarantee that third-party plugins will accommodate the tickets and attendee custom post types in a multi-vendor environment. The FooEvents Check-ins apps have also not been designed with multi-vendor installations in mind and will not filter the display of events based on different user profiles.
Alternatively, you can consider installing FooEvents as part of a WordPress Multisite environment or “network” since we know that this solution has worked for many customers. You can read more about how to create a network here.