![Glastonbury's secret underground Piano Bar where festival-goers could bump into a celeb](https://cdn.newsserve.net/ONPglobe256.png)
Glastonbury's secret underground Piano Bar where festival-goers could bump into a celeb
Glastonbury has plenty of hidden gems to discover around the site - but there's one bar that only a handful of festival-goers have managed to find over the years.
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