I’m 50 something. Need a gym recommendation in N8 and have 3tribes, virgin, pure gym, trinity and Fusion within walking distance. I’m a teacher on a tight budget. Apart from choosing on price (£34 + is the cheapest monthly membership) how do I assess which gym will be kind and encouraging to a flabby woman with knackered knees and a bad attitude to disciplined exercise? Any recommendations from those with experience of these things? Many thanks.