At the SPSP last weekend I was drinking some ginger beer that a friend of mine makes and bottles at 'The Beer Factory' in Sydney:
http://www.thebeerfactory.com.au/
It's 5.9% alcohol - and not bad - you really can't tell it from ordinary ginger beer until the second bottle. Not quite as sweet as lolly water, but just as easy to drink. Mixes quite nicely with astronomy - though I admit a nice cup of hot chocolate with a drop of brandy goes down well too.
Cheers,
Cathi