My husband and I both turned 30 2 years ago and we threw eachother a joint party. We were in the same boat as you- we had just moved to the suburbs from the city (Andersonville area). After looking around for somwhere with a private room that wouldn't be too expensive, we decided on Calo's in Andersonville (www.calorestaurant.com). They were great. It was very reasonably priced, they were very helpful and the private room was really nice. We did appetizers and drinks. For the bar, we paid for all of the beer, wine and soda. They had a full bar available if someone wanted to order a mixed drink, but that kept the cost down for us. For the appetizers, we ordered a mix so that if people wanted to make a meal out of it, they could or they could just nibble. We also brought in our own cupcakes from our favorite bakery! I hope this was helpful and that the party goes well!