Was I discriminated against? Could I have done anything legally about it?

I had an experience patronizing an open house for a pair of condominiums available for purchase in a building. The open house was advertised as offering a tour of both apartments upon visiting, and mentioned it's hours and dates of availability. No appointments were necessary, and all was thought to be equally opportune for all visitors --immediate tour given along with any information necessary with no prerequisites or specific information about guests needed. I showed up to the address listed, and was escorted to one of the units --the realtor was stationed in the one I was taken to. Once there I didn't receive a warm greeting, was cynically gazed over, felt receiving information about the apartment wasn't dissimilar to pullng teeth, and was told many times that I should