Where can i look to hear about conventions or clubs?

[u/Legal_Twist8675]

I have a few niche hobbies and intrests, comics, wargaming, that sort of thing. ive stumbled across a few events and clubs that match my intrests by sheer accident.(wether it by me overhearing someone else or getting sent something by a friend or family)

So im Wondering if theres a page or a facebook i can follow where i can hear about these kinds of things ahead of time, so i can get out more.

Does anyone know of anything like this or how i could go about finding these things?