Thongs and flip flops, totally unacceptable. Open Birkenstock’s totally acceptable!
Seriously though, I don’t think it really matters what you wear anymore. I’ve seen Bill Gates arriving at the Villa d’Este for a meeting with the government in shorts, T-shirt and tennis shoes and people on a cycle ride in a suit. You pay for lounge access in your ticket price so you should be allowed in no matter how you dress.
