Using what you’ve got.

​We have 4 metal posts in the middle of the studio. The posts have caused some discussion. Mainly about how we can get rid of them. We weren’t fans.
After reading a web page about how to stretch the psoas muscle using a door frame. I came up with the idea of using the posts for the same stretch. 

You can read the full article here- yogainternational.com/article/view/how-to-stretch-and-strengthen-the-psoas .The article has a warm up sequence which you should do prior to this stretch.
So, a good way to isolate the psoas stretch, whether you’re a beginner or an experienced practitioner, is to practice Virabhadrasana I (warrior 1) in a doorway. Find an open doorway (or a post) and step up close so that the right side of your body is just behind the door jamb. Step your left leg through the doorway, and place your right foot two to three feet behind you, with that back heel off the floor. Stretch your arms overhead and rest your hands on the wall. Bend both knees slightly, and align your pubic bones, navel, and breastbone with the door frame.