Calton View Cafe (Royal Mile)

You're walking down Jeffrey Street, just off the Royal Mile's mad circus, and you spot this place—all big windows and natural light pouring in. Calton View's the kind of spot locals actually return to, not because it's trying too hard, but because the coffee's consistently good and the staff aren't rushing you out. The vibe's refreshingly relaxed for somewhere this central; you'll see people working on laptops, mates catching up, the occasional tourist who stumbled off the main drag and felt genuinely lucky. It's small and unshowy, which is precisely why it works.