Between $130 and $150 for groceries. I pretty much only buy for me (though my roommate and I will often cook together). He spends about $200 a month. We buy pretty much the same stuff, but I buy in bulk, use coupons and take advantage of sales (ie, a case of canned corn when it is on sale for ~$.20/can).
As for eating out, it varies month to month. This past month, it was about $150 on food and only about $75 on alcohol (including my homebrewing costs, which brings that expense down significantly).