A bunch of people riding motor cycles in the rain are stopped at a stoplight.
Masses of people riding motor bikes on a rainy street.
A rain-wet street view with  lots of bike riders, rimmed with buildings that seem to bunch up and fight for space might look gray and unprepossessing, but doesn't, in part due to many cheery pops of color in the rider's attire and the buildings.  
People are riding on bikes on a road after it has rained. 
A group of people on motorcycles at an intersection.