Every year, Les Bulles de St Martin organizes an Open Day at the wineries producing Bugey Cerdon in the commune of St Martin du Mont.
The aim of the day is to bring together customers and enthusiasts of this natural sparkling wine at the Domaine de La Dentelle in the hamlet of Gravelles. A country-style lunch featuring Bresse chicken on a spit is on offer. Visitors can visit the winegrowers' stands, taste their products and enjoy lunch on reservation.