Call ahead worked perfectly for us this week:

4:15pm - called to get a table for 9 on the list
Told to get there for 5:20pm
Arrived at Manny's at 5:30pm and were called straight in and sat down.
It was Wednesday 2for1 Fajitas.

Everyone we chatted to was american, no english at all.

We will be going again during then next 2 weeks so will report if any different on kids eat free night.