Advice about Endoscopy job?

I have never worked in an office setting before, strictly unit nurse and telemetry floor. I recently started doing agency work with a company that sends you to private practices and clinics. I told them that I hadn't done it before and they said that if I have been in the unit than I should be ok.
I have an assignment at an Endoscopy Clinic on Monday and I would like to know what to expect. What do the nurses at these offices do on a daily basis? Any advice would be appreciated.