I've been running a coffee house/open mic twice a month since last June out of a church hall in downtown St. John's. We have a full sound system, pay the featured artist (who plays a 45 min. set) and the sound guy. Open mic performers are admitted free. They sign up between 7:30 and 8, which is when we start. First there's a 50 min open mic. then a short break (10 min or so), featured artist, break, more open mic. It's the only smoke-free, alcohol-free venue in town and early evening compared to the clubs. We ususally have about 10 acts for open mic, all doing about three songs. I fax the info to cable station, radio and press and put up posters in local music stores and a few strategic locations. Performers and audience alike really appreciate the fact that folks are there to listen. It's so popular that I will soon commence three new locations! I hope this helps. Best of luck.
R.