Open beers is the loophole. Bars never stopped selling buckets if they were un capped or they were breaking the law.It appears that when we got rid of the 3.2 beer back in 2019 that the beer buckets went away.
“- Why will my local bar only sell me two beers at a time, instead of the bucket of beer I used to be able to buy? The laws that govern full-strength beer, wine and liquor sales restrict the number of open, full-strength drinks you can purchase at a time from an on-premise retailer, like a bar or restaurant. So, buckets of beer are no longer available in Oklahoma for the time being.”
https://www.kjrh.com/news/local-news/q-a-oklahomas-new-beer-rules
I have a liquor license and know a thing or 2