I do the first interview on a weekday evening right after close or on Saturday morning. I vet them beforehand for hours, needs, creep their fb profile to see what they're like... if it looks good I send them a handbook, and then after reading they book a time. It cuts down interviews, so I don't cut into my personal time often. If it goes well, I welcome them to stop by during a daycare morning to see the space in use. I need to be able to give them my full attention during a first interview. I also don't like having strangers in contact with the daycare kids.