We just got back from a 4-day on the Wonder, and did the bridge tour. The Oceaneer's Lab group had a tour shortly after lunch. We signed up at guest services and ours was around 2:30pm. They had us categorized as a "family tour", so I don't know if they have others for adults only. I just made sure to go to guest services on the first day and ask for reservations. They did not offer me different times, and we were issued tickets which were collected. The tour was interesting, and the cast member who led the group was entertaining. The view is amazing. I hope you get the chance to go.