Only seeing the wrong AirPlay device I'm in a hotel equipped with Apple TVs and I can see my neighbor's Apple TV on AirPlay. I cannot, however, see the Apple TV in my own room. I went through the Apple TV settings and performed the following steps:


Double checked the network: both my MacBook and the Apple TV are on the same wireless network with a strong signal.
Confirmed Apple TV configuration:


AirPlay On
Conference Room Display Off
Play from iTunes in the Cloud Off
Apple TV Name Apple TV 808
Security Off

Restarted the Apple TV via Settings > General > Restart


But I can still only see my neighbor's Apple TV in the AirPlay Selector on my MacBook:



What, if any, further debugging steps can I try?
I don't have an Apple TV in front of me to direct you to the exact place for this, but I'd trouble-shoot this like any networking discovery issue. Make sure your computer's subnet and the subnet of your Apple TV are the same. The hotel may have it configured strangely.

To get your computer's subnet go to System Preferences &gt; Network &gt; Wifi and click the Advanced button then go to the TCP/IP tab. Your Subtnet Mask is shown there and it should match the one the Apple TV is using.

Also (if possible) try and ensure your Apple TV and your Mac are both updated to the latest software available. Apple's support pages also recommend resetting the Apple TV, but I understand that may not be possible in a hotel.

Honestly your best bet is to contact the hotel front desk, since they will be able to do more advanced resets if needed and change the subnet as well.