I'm telling yall, once you get the theory down, it will make playing in every key soooooo much easier. Today when I was at school practicing, I just started playing. Whatever came out, I took it up to other keys. Then, i started a different song/progressions then took that to other keys. All the while, I repeating the progression numbers in my head so that when i got to another key, it was easy.
Of course, if you have never practiced in every key, then everything I just said above won't help you, LOL.