Without going into best practices and how it might be a terrible reason to show a crosstab that involves a slider here is a sample workbook. I think its very much out of best practices. It relies on creating fake axis and plotting text on one of these fake axis and the other using squares and treating weekend as a colour for the second axis only.
My argument would be to find an alternative means of presenting this same information.
WeekendHighlight.twbx 997.5 KB