There is a guy on the www.Bentrideronline.com forums who told the story of his riding a cruiser. He wanted to get into cycling and got a beach cruiser. It was from a big box store. He didn't want to spend much money on a new bicycle because he didn't know if he would like it. He started riding and liked it. He put 5000 miles on that beach cruiser and then saved up money to buy a recumbent.

It just shows that as long as you have a working bicycle in good shape it can be ridden anywhere. The bicycles in the late 1800s weren't as good as the cheaply made bicycles of today, yet those people rode them everywhere on poor roads.

Keep air in the tires and oil on the chain and you'll do fine.