We're a small city so not sure how effective it would be for you, but https://theimage04.com/ was pretty revolutionary among the music circles here. Most people I spoke to loved the old-school newspaper classifieds vibe, and that there's no Web 2.0 bs.

You could do something similar and then print out physical copies of it and hand over a few to local music venues, cafes, pubs etc to spread the word.