There's been a similar trend in the US. The Electra Bicycle Company, in particular, makes several lines of sit-up-and-beg styles of bikes, influenced by both o

There's been a similar trend in the US. The Electra Bicycle Company, in particular, makes several lines of sit-up-and-beg styles of bikes, influenced by both old-style beach cruisers (which are considered retro cool) and the city bikes you see in cities like Amsterdam (Electra makes a model called the Amsterdam, in fact). But I've never heard anyone in the US call a bike a "grandma bike", perhaps because we haven't had such a culture of bike riding here.