I live in the suburbs in a pretty bike friendly area. I still have roads that do not have bike lanes and others that aren't that wide. If I didn't ride on them, I'd probably get about 2 miles before having to stop and turn around.

Honestly, ride your bike and don't be a jackass and most people driving cars will be respectful. I have just as many close encounters in the bike lane as I do on a narrow street without a bike lane and high traffic. Hell, I feel safer riding in traffic than I do on an MUP.