What to do wth small old entertainment center

These make cute bar cabinets, craft cabinets, play kitchens for kids, etc. Depending on the style, you could even use it as a storage piece or knickknack shelf.

look on pinterest - I have seen them gutted then used as adorable pet caves with a bed in them or for (small) kids to play in like a fort

I turned mine into the video game spot. It is under our big flat screen with a smaller flat screen. It holds the video game console, games, movies, controllers, chargers, etc. Now anyone can play a game while we are watching TV and not bother us. Headphones are required to pay a game!

I have seem them used for a cat liter box "cave". We used one for a while to store video game equipment for a teen.