As you’ll have gathered, a guinguette is ultimately more about ambience, an atmosphere in which you feel good, than a type of establishment with a specific cuisine.
Besides, for ambience too, it’s up to you to set the cursor according to your desires. If you want to move and sing (“faire p’ter la pantoufle”, as we’d say in Beaujolais), we recommend the concerts organized at the Maison Eclusière de Parcieux whose stage overlooks the Saône, rather oriented towards world music, or at the café-vélo La Roue Libre Trévoux with its more jazz/pop/rock tones.
If you prefer a more subdued atmosphere, the restaurants Le Petit Port, l’Embarcadère, Chez Bibet, Belle Rives Braises et Condiments, La Maison Bleue or Les Petites Voiles will be more suitable. They’re sure to offer you the emblematic fritures and grenouilles, but not only.