There are many different french classes offered in Neuchatel. If you go to the Office of Habitation (where you need to announce your arrival) you can find a white and green brochure that lists about a dozen different ones. Or you can go to the OROSP office and see what they recommend.
I went to the Ecole Superior de Commerce class which was intensive, (about four hours per day, monday-friday) and was very pleased with the teachers, my progress, and the course overall.
Hey there is a school called Ilingua and what I heard from a friend was that it is very good and she like it a lot. The class sizes are very small and apparently very legitiment with students normally ranging from 18-30.
Thanks HollidayG- I do, but I am too far from Neuch for twice weekly sessions. What I can offer though - is intensive days from time to time- either week days or week-ends, and with B&B accom and meals (or use of separate kitchen, fridge, etc). Any formula possible and 'made to measure' - for 1 to 6 people- more if just for one day. (I am native speaker with 30+ years experience in teaching languages, with UK teaching B.Ed.Hons degree).