Rows or Groups?

Personally I prefer groups because of spacing and mobility in the room but I have recently switched to rows due to student performance and behavior. In groups I don’t get as much participation from the class as a whole but when they are seated individually it kind of puts the responsibility to respond on each individual rather than one or two students who carry the group 90% of the time. 

This is an issue with square groups that I saw as well. Student's could hide in the group and sometimes work was just a little too similar to my liking. 

This is an issue with square groups that I saw as well. Student's could hide in the group and sometimes work was just a little too similar to my liking.