Meetup is an online site to manage local clubs/groups.  It is free and easy to use.  It allows the organizer to select appropriate sized venue.

Group:  https://www.meetup.com/morton-book-club-meetup-group/

Future Events:

https://www.meetup.com/morton-book-club-meetup-group/events/292595726/

https://www.meetup.com/morton-book-club-meetup-group/events/292834383/