hello from Singapore! I've been performing standup comedy for about six years as a hobby. Anyway, last year I went to London and Berlin and I found sites like https://www.opencomedy.com/ and https://comedyinenglish.de/ super useful in finding open mic gigs to perform at. I know in the post venue owners and bookers were mentioned but wanted to highlight that for comics who travel, sites like yours are super useful to us too albeit we aren't the ones really making the money.