McLarens Piano Shop proprietor Jamie McLaren has earned a reputation as Glasgow’s number one piano man, trading as The Piano Wizard. This is a great piece of promotion to set up a piano in Central Station and let anyone tinkle the ivories. There's always a ready audience, even if it's only one.  
Piano keys, of course, are not made of ivory now, given the decimation of elephant populations in the world. Current debates centre around whether ivory antiques in themselves should become illegal items to trade.
Extra: It's no accident that fast food outlets have glass frontages. They look so enticing on a dreich winter's day.