you can have coffee as soon as you are off Clear Liquids (a week for me). Just make sure and time it with your "meals" (your chicken broth), as in not 30 mins before and not an hour after as this will make it easier when you begin to eat solids.
you probably won't be up to going to that appt. It's not absolutely impossible, but you will still be very sore and very worn down. Also, the pain meds really knocked me out, within 20 mins of taking them. If you are dead set on going, make sure you head out earlier than normal so you can take it slow getting in/out of the car/parking lot/office. WALK SLOW!
My doctors/nurses gave me all the info I would need post-op in all of the sessions that I was required to attend before surgery. I was required to take a 4 week "class," a meeting with the nutritionist, a meeting with the psychologist, a group discussion with other banded patients, and several meetings with my nurse about how to eat, what to eat, healthy alternatives, etc. Lahey Clinic in Burlington, MA has an amazing program with a plethora of information.
I had to stay one night in the hospital. Almost had to stay another night because I couldn't urinate (sorry, gross I know, but wanted to let you know!)
Good luck to you!