Where will I get an Egg McMuffin?

 
Let’s assume we actually rocket to Mars.
Let’s also assume there is about of hundred of us who came along on this six-month long voyage.  We also could easily assume dozens of us could be stuck in the middle seat getting there.  Then about half way to Mars they could run out of peanuts and ginger ale.  Then about one month out from Mars someone could stupidly set off the smoke alarm in one of the rocket’s lavatories vaping persimmon flavored E-cigarettes.
So when we finally get there where do I go to get my hair cut?  Will there be an Apple store with iPhone battery replacements at Mars mall?  What about running shoes?  Is there a New Balance store nearby?  If I happen to fall down on the sandy glass shard Mars surface and open a large wound and it bleeds, where is the closest Urgent Care?  What if I lose cell phone service?  How do I post on facebook and text my mom?  And last of all and most importantly, where is the nearest Starbucks?  I gotta have a white Latte every day to get me started. 
By the way when is the next rocket scheduled back to mother Earth?  What if I forget to bring extra underwear and toothpaste.  I would need to get back to Earth right away.  What do you mean the Pilgrims never returned back home?   I have only a one-way ticket?  Darn!