Final answer:
Based on the given information, it is not clear where Coleman began performing with an unorthodox quartet.
Step-by-step explanation:
Based on the given information, it is not clear where Coleman began performing with an unorthodox quartet.
The provided references discuss various topics such as jazz bands, happenings, and poets, but none of them specifically mention Coleman or an unorthodox quartet.
Therefore, without further information, it is not possible to determine where Coleman began performing with an unorthodox quartet.