Possible Clues:

• Concert performers
• Spike welcomes a number of honours from university for the musicians
• Key players?
• Key players producing pastis in cocktail
• Keyboard players
• Musicians pass in it, travelling
• Ivory tinklers
• Ragtime entertainers, e.g
• They're all fingers and thumbs playing on the benches
• Pub performers sometimes Brahms and Liszt, for example