Keys used a new technology called Yondr which is a lockable pouch in which guests are required to place their mobile devices.
The pouches allow music venues, schools and businesses to create phone-free zones.
They have been used by artists such as Gun N Roses, The Lumineers , comedians Dave Chapelle and Chris Rock used the technology for his pre Oscars warm up shows.
We hear from Graham Dugoni, founder of Yondr and get the views of Al Porter.
Listen back here: