How to approach general contractor?

[Roy C.]

Hello BP,

I was driving down a neighborhood yesterday, and I saw people rehabbing a house.  I wanted to ask them about their business but I didn't know how to approach. And I didn't want to be look like a creeper... Some of the guests on podcast recommend doing this method to establish network with different contractors. Have you guys had any experience with approaching random contractors and asking for their business? I would love to hear about that.