[an error occurred while processing this directive] These are low power transmitters, so you will need to be within roughly 1/2 mile to pick anything up. Many are using simplex systems, which means that they transmit and recieve on the same frequency, so you should have good luck finding one frequency where you will hear both sides of the conversation.
Arbys
31.0000457.550
Burger King
30.840031.0000
170.3050457.5625
154.5700457.6000
467.8250467.7875
461.2875466.2875
Carl's Jr.
30.8400806.0000
817.5875819.2375
154.5700816.1375
817.6375819.3375
457.5375816.2375
817.7375819.5875
460.8875816.3375
818.1375819.6375
461.0875816.5875
818.2375819.7375
465.8875816.6375
818.3375820.1375
466.0875816.7375
818.5875820.2375
468.3875817.1375
818.6375820.3375
806.0000817.2375
818.7375820.5875
806.0000817.3375
819.1375820.6375
820.7375
Dairy Queen
30.840154.57
Foster's Freeze
31.000170.305
Hardees
30.840154.570
35.020154.600
Jack In The Box
33.400154.540
469.025
Kentucky Fried Chicken
30.84031.000
33.400154.570
170.305457.5875
457.600460.8875
462.750465.8875
461.0875462.7625
467.8125467.8875
806.000
McDonalds
30.84031.000
33.14035.020
151.715151.775
151.895154.060
154.570154.600
154.700165.600
169.445467.775
457.550
McDonalds Wireless Mic Freqs.
170.245170.305
171.105171.905
Taco Bell
30.840031.0000
33.4000154.5150
154.5400154.5700
466.0875466.5375
457.5375457.5500
460.8875461.0375
461.0875461.5375
464.9625466.0375
468.3875469.9625
Wendys
31.0000170.3050
457.5375468.3875
460.8875461.0875
465.8875466.0875