It is perfectly possible to be an entrepreneur without a network of other entrepreneurs, you're better off concentrating on your customers initially anyway.

I see a disturbing trend in my environment where people will spend more and more time 'networking' and less on developing their product and / or their business in general. They're all backslapping each other what great entrepreneurs they are, they organize events and so on. Meanwhile the real entrepreneurs run off with the contracts.

Networking has its uses, but don't overestimate it.