Whether it is romantic or not doesn't depend so much on what you do but simply on the vibe between 2 people.
I've had an extremely romantic date with a man at home, something I never do but it was peak season, gorgeous weather and we would not in a million years have been able to find an empty table anywhere, let alone parking space. So it was more of an emergency to let him come to my home.

All we did was talk, laugh, talk. He asked to see my garden as I'd told him a bit about that, and there he held me in his arms for... minutes, hours? I don't. It was so magickal time seemed to stand still.
Then suddenly it was dinner time and we were both like, oops, now what?
He took me out to dinner and we had a great time.

So we didn't do anything in particular. It was just the vibe.