Man, you're lucky and you don't even know it! You're sitting on a cellar, my friend! You can do all kinds of delicious lagers! Kolsch is an ale strain but will work very well at 55. Also, you've got great temps for aging more complex beers/wines. For beer, keep your bottles somewhere a bit warmer (~65-70) for a week or two, then condition it for the long haul at 55.