Burn it off by pounding the cobblestoned streets of Vieux-Lille (the old town), perhaps with a sinful stop-off at macaroon-maker Patrick Hermand on rue Basse.
Lille springs to life at night: taverns and brasseries start to fill from around 11 pm, when tourists and locals share stories in the wooden-walled drinking holes off the Grand Place and throughout Vieux-Lille.