If a guy wants to go for coffee, is it a casual hangout or there’s an interest?

Long story short my former intern keeps in touch w/ me to ask if it’s alright to add me as his reference as he is out job hunting. Once he mentioned that we should go for coffee or do lunch sometime if I was ever free. I was unable. Then time passed and fast forward to now he brought up that it would be nice to meetup for coffee and to find some time where we don’t have to rush, that we have at least 2 hours to catchup.

Is this casual?
If a guy wants to go for coffee, is it a casual hangout or there’s an interest?
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