Got to tell you this story. The singaround was friendly and welcoming, the Landlord of the pub was a different matter. He is now an Ex Landlord.

Nick...(entering the pub) 'Can I have a pint of Water please.'

Landlord....'I'm not letting you sit here just drinking water.'

Nick …. 'Well I was going to offer to put some money in the charity box.'

Landlord...(aggressively) 'Well that doesn't put money in our till.'

Nick... 'Fair enough, I don't mind paying for it.'

Landlord...'You can buy bottles of water.'

Nick... 'I would prefer tap water.'

Landlord.... 'I told you...

Nick....'Alright alright, a bottle of water then.'

Landlord.. (Accusingly and with a sneer) You (pointing) do concerts don't you.

Nick...'Yes.'

Landlord 'Do you do them for nothing?'

Nick (getting pissed off) 'Yes I do as it happens.'

Landlord (Taken aback) 'Well...er...We do a lot for charity too.'

Nick...'It f***ing sounds like it.'

Landlord looks like a mongoose viewing a snake but decides he had better back down on the grounds that he is about 5ft 6' and I am 6ft 2' and from South London.
I took my bottle of water joined the singaround, and made it last all night. The singaround moved pub. I can't think why!