We were having this conversation in Feb.

I carry Guiness warm when I travel into the hills, warm bottle of beer between my legs as I drive, drink it more like sipping coffee.

With what seemed the most common beers at hand on the rock (excluding RS and RS Light) I made the observation that
Dragon warm was the hardiest
Guiness warm helped pass the day
Red Stripe Bold needed to be cold and fell right below Guiness and above Heinekin which I prefer cold also