You don’t even need a homeschool room. We have homeschooled for 7 years. One year we had a homeschool room and we didn’t even use it!
The dining room table is our favorite workspace for group work. The table gives us enough space to spread out, it gives us space to put all our materials out.
Sit on the couch. Or lay in bed for read-aloud. You do not have to be uncomfortable to learn.