I was reading HotWire's Terms and Use and I found this: h. Hotwire's minimum age requirement for checking into a hotel is 21; Does this mean that people under the age 21 can't be a guest? Or just the primary guest must be over 21 years old? For example: I'm travelling with my father. Of course he is over 21 yrs old, but I'm not. Is this a problem? Thanks.