Dio Deka via IG: sloams If you long for the good ol’ days where people dressed up to eat out, Dio Deka is calling your name. The last restaurant (we think) in Silicon Valley that still requires formal dress, Dio Deka in Los Gatos looks intimidating with a business-like atmosphere. The staff dresses impeccably, with men sporting wearing suits, ties, and golden rings, and women in elegant black dresses. Dio Deka’s owners don’t want the formal ...