A dozen is never enough. Even here, hundreds of miles from the nearest saltwater, shrimp send out their siren call to those of us who delight in devouring their flesh. And when the urge strikes, one way to sate it without draining the checkbook is at Fast Eddie's in Alton, a slightly rowdy music bar where you pick up your own order but are rewarded with large peel-and-eat shrimp for just $3.48 a dozen. Don't take the kids, though, 'cause they're not allowed in.