Dress-down casual. No need to be extremely fancy but nice jeans a button up and maybe a tie if you really want to but not necessary. For ladies, the same could work but a nice sweater or top would also work.
Dress clean, ensure you're presentable
don't wear anything that looks unprofessional as this is a service industry
Jeans and t-shirt
Business casual. No tie.
Wear a clean outfit; it doesn't need to be elegant.
Casual attire if you are applying as an associate.