First there is a phone screen where they make sure you meet the qualifications and will ask you a couple general questions. If they like you, you will be invited to a group interview at WB.
There were about 50 applicants there. You do some ice breakers then each person must do a 1 minute 'audition' in front of everyone as if you were a tour guide (even though you aren't going to be hired as a guide). After the audition, you split up into groups and do a little situational activity which you present to the room. The managers are evaluating you throughout the process, and while you break for lunch, they deliberate.
After lunch, they will call out people for one-on-one interviews (these are the people they are unsure about). While this is happening, the remaining people do a Q&A with a couple current tour guides.
After they have either sent home or accepted the one-on-one interview people, they announce the next step, which is the background check. After you fill out the stuff for the background check, you go home! My group, they hired a TON.