Mutiple day appointments, with individual dates

Some of my classes run for up to 12 days...
however I need my customers to be able to select individual blocks of say, 3 or 4 consecutive days or individual dates... and not just a single block of 12-days.
currently this isn't possible, which means, that for those classes I need to manually schedule them with my customers...

Would be brilliant if it would be possible to have the option to offer "split" / individual dates and not just consecutive days in the selection process...