My road club which has been going for donkey's years and is traditional and set in its ways, has a website which seemingly no one visits or is interested in, no facebook. Important messages are via email ,( happens once or twice a year) if the weekly ride changes messages go out on the Strava group which probably only a quarter of the club are in anyway. Does not really need much communication, the ride is on a saturday at 09:00, turn up and ride, simples!
My MTB club is fairly new, has a website full of information but its facebook page ( private) is very active and lots of people participate in. Needs more communication as well as the weekly sunday ride, people organise off the cuff rides on a lot of evenings, ie I am out anyone else?. Also the club organises several events each year and socials , my road club does one race and a xmas dance.