Yes, we eat red meat. I didn't for years, as a kid and teenager (because mum was head cook!), even though we are not religious, although my mum claims we're Anglican, but we have never gone to church or followed any other kind of religious things. Now that I am in charge of cooking most of the food in the house, we eat what ever we feel like.
If I were in the presence of someone who follows a religion which requires some sort of special thing (like eating fish on Good Friday) I woudl likely do it, considering it wasn't offensive to me in any way. It's usually a simple thing to do and makes everyone happy!