FWIW, here's a listing I've compiled of fast food restaurant frequencies.
The "inside" frequencies are typically the more interesting ones,
especially later at night.
The listing can be read horizontally to see who's on a particular
frequency or vertically for some of the major chains to see which
frequencies they've used elsewhere.
This list was compiled from numerous posts on the Internet news groups
alt.scanner and rec.scanner from many posters, among them:
Thanks for sharing the information!
Warning: unfortunately some of the postings confused CTCSS tone
frequencies (in Hz?) with carrier frequencies in MHz, so some
of the listings below are unreliable. I've started listing
specific references next to frequencies listed. Scan the bands and
see what's around locally.
Hope this helps; have fun,
-Patrick Penzias Dirks, pwd@apple.com.