Here's a random lunch chooser I whipped up as a joke a few weeks ago. It might get you started
Code:
#!/bin/bash
rnumber=$((RANDOM%17))
case $rnumber in
0) echo "Chuy's" ;;
1) echo "Ninfa's" ;;
2) echo "Pete's" ;;
3) echo "Hin's Garden" ;;
4) echo "Joel's MOM's!!!111oneoneeleventyoneone" ;;
5) echo "Chipotle" ;;
6) echo "Freebird's" ;;
7) echo "McDonald's" ;;
8) echo "Antone's" ;;
9) echo "Jack-in-the-Box" ;;
10) echo "Cafe Express" ;;
11) echo "Indian food (Westheimer and Bering)" ;;
12) echo "Lebanese - Cafe Lilly" ;;
13) echo "Thai place" ;;
14) echo "C.H.Burger" ;;
15) echo "Starbucks! (Is coffee a food?)" ;;
16) echo "BW3's - HAHA! J/K, it's closed!" ;;
esac
exit 0
This shows you how you can use the built-in random number stuff in bash, but not much else

I might take a shot at what you're actually looking for when I get home later.
-J