The training grounds wouldn't be the worst place, but the spot John chooses is absolutely perfect. John's right in that there shouldn't be a lot of people around there right now, so they could get more than enough privacy to talk, and there should be plenty of spots for them to have a seat by the edge of the water.

My Lord John, that is a most suitable arrangement. I can meet you there promptly, should you give me fifteen minutes to find my way there. Likewise yours, James

Sorry, he just couldn't resist matching John's style. It does come across a whole lot fancier than casual texts, he has to admit.