Here are two numbers from the show performed by students on the Professional Clown Course at the Escola de Clown de Barcelona, in "El Local", a bar in Figueres.
They show that in just 5 weeks (of an 8-week course) it is possible to be performing clown material that really works.
By "really works" I mean performances that make an audience laugh spontaneously at the stupidity of the clown (and not, as I have seen so often, at the concepts, fantasies, ideas or ideologies that many performers try to sell whilst trying to clown).
I mean numbers that are carefully constructed along clown principles (and not according to narrative, character, or vague ideas of improvisation or "self-expression").
At the Escola de Clown, we have created a course of studies that is taught by an integrated team of teachers. They are not an odd collection of individuals who each teach "their vision" of clown and who make the students start from the beginning every time they have a new teacher. They are instead concerned with leading the students through a process that passes through all the key moments: playing, pleasure, relationship with the audience, failure, form and structure.
There are many places where you can study with a single teacher, or with a mixed bag of teachers, but I think this place is still unique in providing a truly professional training.