I worked in a Chelski faithful pub 'The Worcester Park Tavern' in 2001 in London. Scariest 3 months of my life.
Staff wore blue shirts and the manager changed them to red...they soon got changed back.
One day he turned the Sky upstairs (which controlled the whole pub) over to watch Sunderland play instead of a Chelski game...they kicked his flat door in, changed the channel and set the remote on fire on the pool table.
They let me get away with being a Liverpool fan as I was a Kiwi 'so not a real fan' and just wanted to talk about if NZ needed scaffolders or plasterers. I also made the best cheese burgers in the area apparently.
for some reason, I found the bolded bit pretty funny.