I use JEM 2.2.2 on Joomla 3.8.3 and in my example screenshots I refer to the view of (JEM terminology) "category-list":
The orginal table on
looks like this:
Not the freshest design, I agree, but still a table, using the given space optimal and paper-saving when printed.
After installing JEM-Responsive and following the instructions to the letter, I get his:
I even skipped the right column, to test whether the behaviour changes in maximum width. There is a lot of blank space and while having ten events on the standard screen, the same space offers only three events now.
I think you did something as it was described
here (in German language)
: Restructure table with css.
Both the idea and your work are brilliant, but I prefer to have your change made only on mobiles below 480px width.
I hope I could make my point understandable.