I thought it was because they don't hire elves, so she thought she had a chance, but she has some elf blood, so was denied. Most fast food jobs (or any unskilled labor that young people would normally get) are also 'elf work'. Which is why I was so surprised that she said that about working at the hotel, she was literally applying for 'elf work' when we met her. It's a bit on the confusing side.It depends on how addicted that she is to coffee.
Working there, she could get free coffee.