Originally Posted by Skyforger

There are a variety of yeast strains designed to deal with just your predicament. The Kolsch style of ale was developed to emulate the pilsner-type beers that were becoming popular in Germany at the time, while still using the (then-traditional) ale yeasts for fermentation. The 'California Common' style is fermented with a lager strain which has been selected to retain lager-like characteristics when fermented at higher temperatures. And Cream Ale is, much like Kolsch, an attempt to imitate popular lager characters while using the easier, cheaper ale fermentation methods.

White Labs has strains for all these styles: Kolsch, Cream Ale, and California Common.

I'd go with one of those.

Originally Posted by wailingguitar

Right... you don't necessarily have to have the towel. Get a tub of some sort that is big enough to hold the fermenter and water. Put cold water in it, float some frozen plastic bottles of water in it. Change them out a couple times a day. You can pretty much get the temp where you want it by varying the amount of frozen stuff floating in it. Putting some bleach in the water is also a good idea, keeps it from growing anything unpleasant.

Saflager S23 is a good yeast choice if you don't have a proper temp controlled chamber. It does well up around 60F which is pretty easy to maintain.