Howdy jiu,
That is a new request. I have never seen that one before. The calendar does not support multiple venues directly, and I can think of now easy way of adding those in. However it does seem possible to do that with by either omitting the venue and just adding the details within your description, or by using the PRO plugin to create “Additional fields” for the extra venues and locations. It would not include a map for each location without you adding that capability (doable, but requires some knowledge of the Google Maps API). However, it would still inform users of the whereabouts even without the map. They would at least have the addresses, and perhaps you could link the addresses to Google Maps By copy/pasting the Google Maps URL into a link in the description page.
I hope that helps!
Cheers!
– Brook
