I haven't been thru there in quite a while, but yes, the signs were still there last time. I just tried to find a pic for you in an online search, but no luck - guess that's a "snake eyes" instead of a "square eighter," lol.
Medford, huh? I know the area, but not really well. The mental picture I have is of huge combines, both in the fields and on the highway (always in front of me, lol.)
That means you went through Chickasha, though, which was my dad's hometown. I lived farther east in OK and also in OKC, at various times.
Red beer? I don't know about that. Is it Bloody Mary mix and beer - I don't drink either one, so I've missed that! Sounds like it follows red dirt around, though!
Obviously, if you've never encountered red beer, you're located more than fifty miles east of 81. It's a mixture of one part tomato juice to two (or three) parts draft beer -- often with a shot of Tobasco.
I'll be seeing Chickasha next weekend -- heading home for 50th high school reunion.