This week:POLARSETS Polarsets are a three-piece from Whitley Bay making blissful indie dance music with a summer vibe at its core. Friends from school, Polarsets are Rob (vocals/guitar), Mike (keys) and James (drums) who make sweet music that could easily save you the expense of forking out on a summer break. Tropics by Polarsets Just pop on any of their songs on the iPod and you…