DIY sofa table - a little table with electrical outlets behind your couch instead of a coffee table so you have more room and can easily plug in your electronics! (not as a sofa table, but have some other ideas for this ~J)
This is a perfect combo of my two favorite ideas for that space under the stairs leading to the basement. A reading nook AND book storage and shelves . assuming that there is enough space for this there.
I really like this - DIY Sofa Table .from bench to sofa table . nice to have option to take apart as additional seating is needed Would also save space in an apartment by not having to store the benches somewhere when you aren't using them.