Try to see things from the landlord's perspective. Well, I once rented an apartment to a tenant who owned a cat with poor bladder control, which is common among older cats. When you come to the showing. Wear clean, untorn clothes. Don't come barefoot.
Some people come dressed that way.
I received 20 applications for that apartment. Wearing discreet religious jewelry is O.K., like a small cross on a necklace. In 1997, an applicant tried to convince me to join a well-known suicide cult that had recently moved to Berkeley. Finish off your cigarette, pizza, or coffee outside the building first. Let the landlord know that you want the apartment Don't suck up to the landlord, but don't insult him either.