S1 and S2 tell you only about one club each hence alone they are not sufficient.
If you combine you may think that you will get the answer. However, we do not know if any of the members belong to both clubs.
Is this tricky question??? or poorly formaed question
will you get this kind of questions in GMAT.
What is the source of this question.
Your attitude determines your altitude
Smiling wins more friends than frowning