Food & drink — 3–4 hours
There's no single operator running a packaged food-and-wine tour of Alexandroupolis — it's not the kind of thing any tours marketplace lists for a city this size — but the pieces are easy to string together yourself.
Start at the morning fish market, work through a couple of the seafront tavernas and ouzeries covered on Where to Eat, and finish at Kelari Pro Wine Bar for a proper tasting of Thracian and Greek wines that rarely make it onto menus further south.
Treat it as a half-day, multi-stop route rather than a single sit-down meal — that's the format that actually works for sampling broadly rather than committing to one restaurant.