Hi Mark, it will expand, like on mine: http://www.joycegrace.ca/business-meetups-vancouver/#axzz1z9mvDcTO
However if you modify the CSS, or if your theme has a set height on a property that the calendar picks up on, you will need to make some changes to get the calendar to work with your theme. We can only guarantee it works on the latest version of the Twenty Eleven theme.
If it’s any help, we have a tutorial on integrating our calendar with Genesis themes here: https://theeventscalendar.com/tutorial-integrating-the-events-calendar-w-genesis/
However I doubt you’ll have a problem with rows expanding. Just keep in mind that this can be theme dependent.