Hotel elevator has staff and guest buttons

I snapped this photo in an elevator at the Holiday Inn Express in Mérida, Mexico. There are two sets of buttons in the elevator, one "for exclusive use of guests" and another "for exclusive use of staff." I made sure to use the staff buttons when I rode the elevator, just because some rules are meant to be broken. I also saw a staff member use the guest buttons, but I didn't snitch. Click to see the photo larger.