So, what was this meeting about that was so massively important the girls couldn't have delayed for 10 minutes to get a few bananas?

In the absence of evidence to the contrary, I'm going to assume that they were visiting a solicitor to get an injunction against one of Mahamed's suits.

Maybe it was something to do with the selling location?
There must have been some logic to the girls getting the zoo and the boys the beach - I wonder if they both had to pitch to the zoo but that was cut from the show for time?

It was just Gobby being akward for the sake of it and trying to assert that she wouldn't comply with someone else's request no matter how much sense it made.

Yes, it's the only reason I can think of, but then I would've expected the team leader to head up the meetings over the choice of pitch.

It's all a bit of a mystery