Can they ask that? Illegal interview topics.

Topic: Membership in a Club or Organization

15.0% of readers had been asked about this
felt discriminated against on this topic

Topic is:  Legal (but dangerous)

Details: It is perfectly  legal to ask about organizations that are relevant to the job, such as trade organizations.  

However, employers should not ask about organizations that would reveal information that might be protected such as age, ethnicity, sexual preference or religion.