The energy used to warm it up is negligible, at best. But who the hell sits back to enjoy hot water in a cup. Coffe or tea is one thing, but just a glass of 150 degree plain water? That just sounds awful.
And as for warm beer; there is a saying.. "Real men drink real ale." Real ale is also called cask ale, fermented and served right out of the cask, served room temp warm. I can only agree on a few beers that can be warm-ish, the rest have to be between 35-45 degrees. I keep my kegs at about 40 degrees.
Mt Snow, VT - May 5, 2012 - Completed!
Gunstock, NH - June 1, 2013 - Completed!
...i remain, he who remains to be...