i work at Tim Horton's. i have been looking for a different job since the day i started. i really like the people i work with (minus one), but the job SUCKS. i don't even drink coffee (never have). if i had the opportunity to leave for a different job i would certainly look into it.
can you perhaps work at both places? that way if Sephora doesn't work out you have Second Cup as a "back up"?
in any case... i'm sorry to hear that your co workers aren't so great.
it sounds more like they're the cause of your job stress more than the actual job itself.
(if Sephora calls you for an interview go for it! you have nothing to lose by giving your all at an interview, kwim? you can decide if you want to take the job, if they offer it to you, or stay with Second Cup when the time comes
)
... wow... that was the most disjointed post i've ever created. srsly time for me to head to bed (stupid coffee shop shifts are killing me too... lol)