I've been trying to do my part for chiptune shows by setting up various social media sites to tell crew about! Instagram syncs to Facebook + Tumblr, and Twitter is posted separately, but whichever social media network you use hopefully the page is of use for ya!
https://www.instagram.com/chiptuneshows/
https://twitter.com/chiptuneshows
https://facebook.com/chiptuneshows
https://fuckyeahchiptune.tumblr.com/
https://www.threads.net/@chiptuneshows (dead at the moment cos no cross-posting allowed, but if that changes...)
And if you have any shows coming up, email me the poster + event blurb! (my username at gmail.com)