The Mary Wallopers

I do not have sufficient reliable information about an artistic organization by the name of 'The Mary Wallopers.' This name might refer to a musical group rather than an organization or venue, but without additional context or a specific location, it's unclear if it relates to a particular ensemble or collective known for hosting performances or events. It's also possible that 'The Mary Wallopers' might be a recent or lesser-known group not widely documented in historical records. Therefore, I cannot provide a detailed description. For accurate and detailed information, further research or context would be needed.