WeeeeL - The Late and unlamented Watney's "Starlight" was so weak - less the 1.2% it could be sold without a licence in the UK.
Personally, as a bloody awful singer, and self concience, I normally require 2/3 pints just to join in the chorus - Anything over that then my judgement goes astray, and I tend to want to sing, as the odd UK Catters meet has found out to thier cost.
I also have one Golden Rule - If I'am driving I don't drink - FULL STOP ! Perhaps this might explain why I don't attend folk clubs in the Cardiff Area.