As someone who does a great amount of marketing and promotions in the music scene, I'm covering shows around town several times a week. Instagram is widely popular with bands, venues, photographers, and other media (like myself with KWSS radio).
There is great value and exposure for bands that promote events on social media, specifically Facebook. You have the potential to reach several hundred or even thousands of users if you plan correctly.
There are no excuses- with social media and all the tricks (hashtags, live video, geo-filters, check-ins, etc.), your event should practically be a trending topic in your area. You should be embracing #FOMO (Fear Of Missing Out) to the fullest. Here's how.