Where to look for dirt cheap live entertainment

I started organizing events for singles in September of this year and every week, I look for things to do for the group. I have a big group of 900 people and I enjoy leading them to check out a happy hour, a comedy show, a movie, a club,  a tasting room, dance lessons, etc.
My favorite recent discovery is goldstar.com ;  the successful brainchild of 3 UCLA, Stanford, Harvard graduates.
So this website: Goldstar has FREE tickets! I thought, this can't be legitimate...but they are and they do have many complimentary tickets.
They work with places like IMPROV Comedy club, and other businesses,  give their tickets for free or for 50% even 75% off to fill up the show.
I organized two comedy shows, which were extremely hilarious. We got in FREE through Goldstar, while the venue sells it for $20. Great deal :)
I also got free tickets to an international gem show, which was a treat for a  crafter like me.
Right now they are offering a complimentary ticket to Allan Harvey's comedy show at the Improv on Dec. 22nd.. He is the creator and host of Comedy Central's Night after Night.

They are nationwide, so if you are planning to be in Vegas or New York  or LA for the weekend, you can also look for discounted ticket prices.

Here is the link to their website:  https://www.goldstar.com/join?p=F2269138RP