Terraces Lounge in Gatwick

Happy new year to all - We are heading off to Barbados in April for my wifes 40th and could not get a good deal with VS so are flying Club with BA. I have never flown BA from Gatwick and was wondering what the facilities are like in Gatwick ? We are staying at the Sofitel the night before and should we go for the breakfast in the hotel? We are a family of four and also have some friends also on the same flight flying WTP - Do BA allow you to bring a friend in? Also if anybody knows that when you fly Club with BA do you get priority passes for security - Many thanks