Do them a favor by paying (33.33+.01) % of the bill. The couple pays the rest. Give the couple the larger room. There should be cooking, trash-hauling, grocery shopping, cleaning schedule that everyone has to follow. It's okay to do favor as long as it's not 15 miles-plus ride to work back and forth 21 days every month. Help in stuff which does not occur on a regular basis is fine to promote harmony and goodwill. If it becomes unmanageable, find a newly minted roomie who has a love life similar to yours. After all, it is quite hard to live with a couple if they are not one of your amiable relatives. Also, married people and single people have different Lifestyle which by the way is a very famous brand. If nothing works out and you can't think of any other option other living with the magnetic couple, here is what you can do. Since you can't goto Gorkha looking for Ram Shah for justice, Judge Judy might be your last resort.