Finding a job over 40 can be difficult in some industries. Despite it being an age when it is important to firmly establish your career, many people over 40 find themselves out of work. And is being out of work can be a lonely time.
It is important to spend time with other people in both business and social environments. Networking events are a great way to achieve both of these. You can even use groups such as Toastmasters which help people to develop their public speaking skills as well as providing a forum for both social and business networking. I know many managing directors and chief executives that have been members of Toastmasters!