" Sit for eating and not meeting "

I entered a restaurant and sat down. There were many boards fixed on the wall with different messages. I read the first board which said " Open to all cast" and realized it meant " Open to all caste".

I read the next board and under Menu it read to place your order for " Arm to let" and after inquiring with the waiter he explained it meant " Omelette".

I looked at the next board which read " Kindly sit for eating and not meeting"

and finally as I left I glanced at the last board which read as follows" Do not leave your wallet behind as the one who finds it will think it is an answer to his prayers".