Scatter Plot: Decreasing Spacing Between Scatter Points/x-axis Ticks

I am currently working on a 2x2 subplot figure. In each subplot, I have 3 groups on the X axis. I want to decrease the spacing between each of these groups on the X-axis. Currently

Solution 1:

Assign or use numeric values to the x axis then label the x axis ticks with the non-numeric information. Then you can play around with x-axis scaling and limits to move the plot around.