Summer rooftops?

Jemima V&E( United Kingdom )

There aren't many places where a party of 20 could just show up without booking- especially in the summer. I recently went to Boundary in Shoreditch which I loved, but very long queues so you'd have to book. Aqua on Regents St has a nice big roof top bar. Or Vista at the Trafalgar Hotel, which has recently opened so might not be too busy. Hope that helps!