Players see the venue name, address, venue phone, web site and pictures on their offer. The contact person and your venue notes stay with you. Put anything players need, like load-in time, in the gig's own notes.
A venue you add is private to your band and shows not checked yet until the site master looks it over. You can use it for gigs right away. If you change it later, it is checked again.
Only the site master can remove a venue.