Yes the rooms at Hotel du Soleil are non smoking rooms. I would recommend the larger rooms with a terrace, if it fits your budget, as it is ground floor and has a lovely terrace.
there were no ashtrays in the room which we stayed in, there were ashtrays in the outdoor seated areas - I suspect all rooms are non smoking
I agree, I think they were all non smoking. You could smoke outside as there were ashtrays both on the terraces and poolside
Get an answer from Hotel du Soleil & SPA staff and past guests.