Let's say you're backpacking and you're staying at a super-cheap hostel. Either because you have a lot planned for the day or you're catching long distance bus / train, you've to get up really early in the morning. The showers either don't have hot water or it doesn't work. It's cold and you really don't want to stand under a stream of freezing cold water.
Not really a hypothetical scenario because I've been there, done that, got the t-shirt. So what's your travel tip for when you're travelling and find no place to shower?