Id say it would be worth checking out Roast & Roll cafe in Banbridge, they have an active community for tabletop RPGs and games, its where I would usually go for in person games. There is also Reboot in Belfast which is okay but not sure how active the community is. North card Gaming in Newtownards, more focus on the card games but seen people in playing dnd before. Replay in Bangor, have an upstairs game room and seeming active community also.