The phrase "multiple sittings" means having more than one session or meeting to do something, or taking breaks between periods of work or study. Full definition
The main pavilion features a spacious and well decorated living room with multiple sitting areas including window seats looking out to the view. (paradizo.com)
The cooking area provides an all - encompassing view of multiple sitting areas. (styleathome.com)
It offers multiple sitting arrangements so that you can adjust the seats according to your own convenience. (mommystroller.com)