Square dance square dance, very rarely are two modern Western dances ever alike. Like traditional square dancing, recovering from occasional mistakes is often part of the fun. Dancers are encouraged to dance only those programs at which they are reasonably proficient, the default level of achievement being the Mainstream program. All programs are set by Callerlab, the callers' international association, which also governs the training of callers. Irish and Scottish dances are normally done to traditional tunes. English dances may be done to traditional tunes, though, especially at ceilidhs, there is experimentation with many different musical styles. The two types of American
Staff and line began aspiring to line functions. Management experts believe organizations should minimize their investment in staff positions, because they increase costs while not directly contributing to the organization's goals. Increasingly organizations, especially smaller ones, are beginning to move away from line-staff structures to structures that are more hybrid or matrixed. Staff and line Staff and line are names given to different types of functions in organizations. A "line function" is one that directly advances an organization in its core work. This always includes production and sales, and sometimes also marketing. A "staff function" supports the organization with specialized advisory and support