I am an incoming master's (international) student at a UK university. A few days ago I sent an email to a professor who I really want to work with (if I can get into the PhD program there, to which I am planning to apply soon). He will neither teach a class nor supervise any master's student in the upcoming academic year.
I asked about the possibility to have a meeting with him online, and he replied it would be easier for us to meet after I arrive. I was wondering for my upcoming messages to request an in-person meeting, should I request to meet him at the office/department? Is it generally appropriate/polite to invite a professor/potential PhD advisor for a coffee, so that I would possibly have more time to introduce myself and ask for some academic advice?