Saving on admissions at the COI clubs?

There are so many strip clubs in the city of Industry, CA but the problem is that most of them only have a few lookers and a ton of B.S. to sort through haha. Monarchs is usually free but I keep reading about how some people receive texts to pay a reduced 5.00 admission to Paradise (usually 20 at night) but don't see any mention of this on their website. Also, satin (yeah the place does blow) gives out free admission cards every time you go but then when you try to use it they make some bs excuse why it's not valid that night lol.
If anyone has any tips on saving on the admission fees for the coi clubs I'd really appreciate hearing them. Every little bit counts, otherwise I'll just keep driving down to TJ for a much better deal $ wise.