Where are all the fellow geeks/nerds at?

My brother and sister-in-law live in Helena. They are big gamers(no not gambling) and my brother even has a degree in game development. They also like board games(she specifically said DND would be awesome). He was saying there isn’t a community for it in Helena.

He would be interested in a club for gamers like game development or coding/hacking. Idk. Anyone else in the area have these interests he could meet up with?