I haven't been to a Sonic in a while so I don't know about the coffee drinks but I know they do vary their menu by location. Years ago I had a really yummy grilled cheese at a Sonic in TN. Not one Sonic in FL that I have found has them. I've tried Sonics in 3 different cities- no grilled cheese. Do they think Floridians don't appreciate a good grilled cheese?!
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"If you have men who will exclude any of God’s creatures from the shelter of compassion and pity, you will have men who will deal likewise with their fellow men." — St. Francis of Assisi, 1181-1226