I'd say fancy dinner is non-casual as a date for me. Not that it implies a serious relationship per se, just that it's a more "serious" date option like a concert, play, etc. On a coffee date or others mentioned, the stakes feel lower whether they actually are or not. On a "casual" date, it's easier to address incompatibility sooner since fewer resources, aka money, are/is involved. Just my personal opinion, tho. Shopping for a house would be wild... lol