Jeff has seen old time radios that have had a bluetooth receiver put in them so you can use them as a cool, retro bluetooth speaker. Leo says those a really cool idea. Is there such thing as a bluetooth extender? Leo says there is, but bluetooth is designed to be short-range. WiFi is a lot better and has five times the range. There are plenty extenders though that boost the range. Miccus makes a bluetooth extender with 160-foot range for $40.
Check out these old time radio bluetooth receivers at Wavelengthantiques.com