Sadly, the day we could recommend mixers on Bitcointalk are gone. However, we can talk about reliable sites discussing mixing and the theory of it.
Take a look at BitMixList. I just bookmarked it myself a few minutes ago. The website is created by a trusted Bitcointalk user. You will find what you are looking for there.

LoyceV already mentioned, but mixers and popular centralized exchanges aren't exactly friends. More precisely, the information exchanges receive from blockchain analysis companies about coins connected to mixers causes them to sound many alarms. If possible, stay away from CEXs.

Also stay away from Wasabi and their default coordinator that is partnered with a blockchain analysis company interested in de-anonymizing bitcoin transactions.