I think the drab weather has affected the mood of the party-goers this weekend. But if you are brave enough to face the winter blues head on check out Off the Wall Friday's at Z Square (14 JFK St. Cambridge). This day time eatery has become the jump off and Friday night is no exception. Edgar of So Good Entertainment has worked to make this weekly party THE SPOT by making it FREE - yup NO COVER. Unheard of in Harvard Square - so bet you will want to check it out. Hey, if it's a bad time at least you didn't shell out 20 bones, ya' heard?