In my main friend circle we have a server on Discord where we will stream whatever sometimes, and it's always been known by my friends that I've been a game show fan. In recent years they've been interested enough in asking me more about the genre so I've streamed some stuff from my collection sometimes. They had shows they watched growing up (the Nickelodeon game shows, Jeopardy!, Supermarket Sweep) but would never really call themselves game show fans persay. From me streaming stuff they've definitely gotten much more interested in the genre than they used to. Classic Concentration has been a "comfort show" on nights where we have no anime or movies that we wanna watch. To the point where I would argue that at least one of them has been a genuine fan--she's even gone out of her way to learn a bit about the genre, asking me to stream random stuff she is interested in seeing from my collection sometimes!! I did a Jim Lange Name That Tune episode a few nights back and she recognized Jim as The Dating Game guy.
Of the shows they've all never really watched before, Classic Concentration and To Tell the Truth have been the big hits. Name That Tune is slowly winning some people over, and for awhile there we were watching The $100,000 Pyramid. Card Sharks unfortunately I've tried a handful of times but never gotten anyone to like it enough. I think the "it counts as an incorrect guess if you say 'lower' on, say, a 7, and the next card is a 7" thing kind of turned them all off on that show. Alex Trebek is the favorite host out of people in the server, so I've done some High Rollers in there and that's been a surprisingly popular one too.
Otherwise, Nickelodeon Double Dare, Nick Arcade, Jeopardy!, Legends of the Hidden Temple, and Supermarket Sweep have been the obvious favorites.