The Sprint Store in Houghton Lake, MI.
Went in there with DH, my Grandmother & DD (who's 2.) Walked in, associate is helping a family. She doesn't look at us, acknowledge us in any way. So we look around, pick out a phone for Grandma, watch DD run around (not destroy anything, just the energy that toddlers have).
We were going to purchase a basic phone for Grandma and add it to our plan.
We wait over 20 minutes without the associate (and the only person we could see) acknowledging us. We get fed up, and leave, telling Grandma that we'll just order her phone through Amazon wireless.
On our way out, the associate finally looks at us as w're going out the door. She smiles and says "If you have just a quick question - "
I give her a slight glare and say "We were going to get a phone," emphasising the were.
She gets a panicked look in her face and blurts out "sorry, I'm here by myself, please come back!"
We don't, and we won't be back to that store. If she'd acknowledged us in any way, even saying "sorry, this is going to take awhile" etc, we would have come back, but we're not. Not when they're apparently not taught to acknowledge a customer.
As a reference librarian, I usually get a line of patrons (after school or weekends, usually). If there's a line, I smile and say, "It'll be a minute". If it's a long question, I'll even go a step further and ask if it's just a quick question. I never ignore a patron, and I would never treat a customer like the associate treated my family.