Here is a basic list of Meeting Rooms and Facilities at UCR and around Riverside:
*Botanic Gardens ($25/hour to rent): http://gardens.ucr.edu/gardens/roomrental.html
Alumni & Visitors Center (Many options for small and large meeting rooms - charges apply. They will assist with all the catering for the event): http://hospitality.ucr.edu/venues/venues/avc.html
Mission Inn (Downtown Riverside - need to request a quote for meeting space): http://www.missioninn.com/meetings-events/
Campus/Hub Rooms Reservation System (May have charges for certain rooms): https://reserve.ucr.edu/Default.aspx
Orbach Science Library (Room 240-no charge): https://library.ucr.edu/using-the-library/conference-rooms/request-to-book-orbach-240-conference-room