Do you regard bisexual people as gay?

To me, a bisexual person is a gay who sleeps with members of the opposite sex occasionally. I am not anti gay, but I do not go to any gay clubs or mix with gays as their lifestyle is not one that I want to follow. I had a proper bisexual girlfriend once, but after a few 3 somes I dumped her, as she had some gay friends and I just did not want to get involved in that lifestyle.