A lawyer will tell you what to do and if you need to make a report to the police. Don't lie to the police. You're whole case rests on the fact that you were under the influence of illegal substances. If you were already drinking, you probably were already impaired to consent to taking drugs. I highly doubt you'll go to jail for doing illegal drugs in the past.

If this is going on in all the clubs there, the cops are paid off and you're dealing with organized crime. Aaaccckkk! Lawyer up but you're gonna pay him too!

Weigh it out but I would do least do a couple of consults and have more information before I decided on a plan.

Easiest option might be just telling the CC security people what you told us. IDK what they would do, but they aren't gonna have you arrested and they just might wipe it out.