It doesn't sound like you are looking for friends. You're looking for customers and networking opportunities.
But to answer your question, go to networking events and look for the old guy who is just chilling there. They won't become your friend, probably, but they will actually give you what you're looking for - advice, experience, and potentially, business.
Honestly though, please don't approach this as looking for friends. It's a little gross if you're not actually interested in the person, but what they can give you.
It doesn't sound like you are looking for friends. You're looking for customers and networking opportunities.
But to answer your question, go to networking events and look for the old guy who is just chilling there. They won't become your friend, probably, but they will actually give you what you're looking for - advice, experience, and potentially, business.
Honestly though, please don't approach this as looking for friends. It's a little gross if you're not actually interested in the person, but what they can give you.