Hi Robert,
Thanks for checking out our plugins!
You are correct that there is not currently any opening hours functionality associated with venues, but I think the recurring events feature that comes with Events Calendar Pro may do what you are looking for here. You could create an event for the exhibition and then set it to recur Wed-Sun from 11:00-18:00. I took a screenshot of the event edit screen so that you can get an idea of how this would be set up. You could set the applicable venue for the event, and this way, you would be able to display the correct hours for multiple events at a particular venue, even if their times are different from the venue’s regular opening hours.
We do offer full refunds within 30 days of purchase if you’re not satisfied with the products, so feel free to test out Pro and see if it will work for you! If you have any other questions, please let me know.
Thanks,
Jennifer