I was refused entrance today because I did not look old enough to qualify for senior hours. The person at the door has only her guess if I am old enough. There were several customers entering at the same as myself and several were obviously younger than myself yet I was the only one stopped. At no time was I asked how old I am nor was I asked to show proof of my age. I was only told I could not come in till 10 am. At this point I was debating if it made sense to continue spending thousands with Costco then I noticed nobody being stopped when the clock hit. 9:20. Keep in mind there is not visable signage to indicate senior hours or what age is considered senior.