Another tip:
Do not show up at a restaurant with more people than the number for which you made the reservation. PLEASE call ahead, and be prepared that you might not be able to be accommodated. If your reservation is for 3, coming in with 4 would usually never be an issue, as you are most likely assigned to a 4-top anyway, but making a reservation for 4 and showing up with five, six, TEN just won't do, people!! Just do everyone a favor (yourself and your party included) and call ahead.
Recently, we had two 7:30 reservations for 10. One party called ahead and said they would be thirteen, so we scrambled and made it work. When they showed up, they had 15 in their party. The other "party of 10" showed up with 14 people. It was a mess; both parties were taking chairs from other tables, which left us really scrambling! We literally ran out of chairs. So, please, always try to make a reservation, and always call if the number in your party changes, or if you're going to be late...