From New York to several Midwestern cities, thousands of fast-food workers have been holding one-day strikes during peak mealtimes, quickly drawing national attention to their demands for much higher wages.

What began in Manhattan eight months ago first spread to Chicago and Washington and this week has hit St. Louis, Kansas City, Detroit and Flint, Mich. On Wednesday alone, workers picketed McDonald’s, Taco Bell, Popeye’s and Long John Silver’s restaurants in those cities with an ambitious agenda: pay of $15 an hour, twice what many now earn.

These strikes, which are planned for Milwaukee on Thursday, carry the flavor of Occupy Wall Street protests and are far different from traditional unionization efforts that generally focus on a single workplace. The national campaign, underwritten with millions of dollars from the Service Employees International Union, aims to mobilize workers — all at once — in numerous cities at hundreds of restaurants from two dozen chains.

None of the nation’s 200,000-plus fast-food restaurants are unionized.

The strategists know they want to achieve a $15 wage, but they seem to be ad-libbing on ways to get there. Perhaps they will seek to unionize workers at dozens of restaurants, although some labor leaders scoff at that idea because the turnover rate among fast-food employees is about 75 percent a year. Or the strategists and strikers might press city councils to enact a special “living wage” for fast-food restaurants. Or perhaps by continually disrupting the fast-food marketplace from counter to counter across the country, they can get McDonald’s, KFC and others to raise wages to end the ruckus. The protests’ organizers acknowledge that yet another goal is to push Congress to raise the federal minimum wage and pressure state legislatures to raise the state minimums.