Assuming you mean what do people do with a second room when living alone, here are some popular ideas:
1. Turn it into a home office: If you work from home or frequently bring work home with you, having a designated space for your office can be key to maintaining a healthy work/life balance. It can also help you to stay organized and on task throughout the day.
2. Make it into a guest room: Even if you don't have many visitors, it can be nice to have a dedicated space for guests when they do come to town. This way you don't have to worry about scrambling to clean up your own bedroom before their arrival.
3. Use it as a hobby room: Dedicating a room to your favorite hobby can help you make the most of your alone time at home. Whether it's painting, knitting, woodworking or anything else, having a space that's just for you can be very satisfying.
4. Create a home gym: Working out at home can be much more convenient (and affordable) than going to the gym, and having your own dedicated workout space will make it that much easier to stay on track with your fitness goals.
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