I went to a campus info session held by the organization and chatted with a few people. Later, I sent my contact my career materials and was offered a phone interview. The phone interview lasted about an hour and a half and at the conclusion my potential employer invited me to visit their office.
I know normally you will have a face-to-face interview after a phone interview, if you pass the screening; however, he did not mention anything about an on-site interview. He did say that I can meet with the team and see what the company is like.
Due to my lack of experience, I don't know what I should be expecting on the visit. Should I be expecting a series of interviews with different company personnel or just a casual show-around? Is it even okay to ask about this of my potential employer or to directly clarify what to expect?
For more information, the company is a rapidly growing tech startup with around fifty employees, and it is in the web/user experience industry. The company describes itself as having a very casual culture and working under agile methodology.
UPDATE:
Thanks for everyone who shared their ideas and advices, the visit turned out to be a office-show-around and a couple on site interviews with different teams :)