How to “pair” two widgets side by side in one sidebar [closed]

Currently I use the Pinboard theme with 2 sidebars. In each sidebar I place one kind of widget several times. The point is that 2 widgets of a row (1 of each sidebar) belong together regarding the content.

What I really want is that I could place the 2 different widgets (belonging together) side by side in one sidebar and repeat this for the others in the same sidebar. I found the extensible widgets plugin (http://wordpress.org/plugins/extensible-widgets/) but it isn’t maintained anymore for 3 years. So I didn’t install it. Furthermore, I found some discussions about solving similar problems with tables or with css anyhow.

For better understanding you can see my WP instance here: http://turbine.reimone.net/

My problem is that each widget in a “widget pair” must be configured.
The first widget is an event widget which comes from the All-in-One Event Calendar by Timely plugin and the second widget just is a text widget containing simple html. A “widget pair” is meant to be 2 widgets belonging together by content. Both widgets of a pair should be aligned side by side in the layout. I hope that both upper edges (one of each widget) in a pair are on the same vertical level so that visitors can determine better which widgets belong together.

Can you help me to solve this?

Looking at your site, it appears you have six pairs of widgets that need to be displayed side by side and aligned at the top. There are two ways I can see of fixing this:

1. Using the current layout, use CSS to add top margins to each of the rightmost column’s widgets to line them up with the existing widgets on first column. This is a quick fix, but will require separate margin-top declarations for each widget in that column and will likely be wonky when the site is viewed in different browsers and/or display sizes.
2. Update your theme to have six separate widget areas on your sidebar (see the WP Codex) and put a pair in each. Then updating your CSS to float the individual widgets side by side. This will likely be a better and more flexible long-term solution.