Complex sentence: Consequently, there was a relaxed atmosphere surrounding these sessions and the trio would jokingly refer to themselves as The Three Stooges, an American vaudeville act of the mid-twentieth century, and wore construction site hard hats as they had a "turning up for work humour".
Split into simpler sentences: Consequently, there was a relaxed atmosphere surrounding these sessions and the trio would jokingly refer to themselves as The Three Stooges, an American vaudeville act of the mid-twentieth century. This also involved the wearing of construction site hard hats as they had a "turning up for work humour".