I may be missing something, but only the site administrator can see the Repeat option on the date field. I have given the Content editor role all permissions provided by bookable calendar and a user of that role does not see the repeat option on the form.
I cant find any settings that control this either.
I thought it was something to do with my setup so i created a new instance on simplytest.me with only Bookable calendar installed and I see the same thing, repeat option not available to anyone other than administrator.
Closed: works as designed
2.2
Code
Sorry this is actually a permission on the Smart Date module, nothing to do with Bookable Calendar.