I stayed in London for a networking event for only 1 day. The Stage Door is absolutely a great choice: The place was easy to find, I can easily check-in with bar staff, the room has a separate entrance from the street, the wifi passcode was messaged me in advance. The whole experience was welcoming and hassle-free. The only thing to consider is a bit of noise at night (I'm a deep sleeper so it can be managed). Will stay again.