Michael Eck debuted his new musical persona, Ukulele Mike, last week at the Moon and River in Schenectady. Surrounded by friends and family, Eck ran through a number of songs from many genres, all on the ukulele. No, there was no Tiny Tim or Don Ho or even hula dancers. From blues to old timey – and even one of his own from his latest album, “In My Shoes” – he brought the same gusto used for his Maximum Solo Acoustic shows. Maybe it should be called Minimum Solo Acoustic.