1st interview (phone) - screening Q&A whether or not the job (and sometimes pay) will meet your work-life balance requirements.
2nd interview (person) - work, education, internship, volunteer experience questions.
3rd interview (person) - simple "get to know you" casual interview to see if your personality fits the part.
4th interview (office) - after on-boarding (training at various properties to see how things work) a standard interview setting to see if you're the right fit for a community.