when I was in college, I sublet an apartment where we had like 8 people living there for the summer and only 3 keys to the front gate. I solved the problem of

when I was in college, I sublet an apartment where we had like 8 people living there for the summer and only 3 keys to the front gate. I solved the problem of getting buzzed up when no-one had keys by pressing 9 at the end of the outgoing message on the answering machine. Call the apt on the box and if no one was home we could still get in.