You could make rope drop (by the skin of your teeth):
- If you are seated on time (7:45)
- If the MK opens at 9 that day
- If the characters don't get delayed with big groups of autograph wanters, or all-possible-combinations-of-adults-and-or-children-in-the-party photo takers... etc
- If everybody does bathroom/handwashing while you wait for the server to finish running your card to pay the check (so you can jump and run once the check thing is finished)
- If you plan to walk at a
brisk pace from the Contemporary to the MK gates
It's usually a good rule of thumb to allow at least an hour after being seated at a character meal, to see all of the characters in rotation. This does vary depending on how packed the place is at the time, but Chef Mickey's is
never un-packed.
Personally, though, I would do CP instead - I just like that one so much better than Chef Mickey

Plus, you're already in the park (after rope drop) so it wouldn't be as stressful if rope drop is very important to you.