Siena is tiny, so getting a table on a Saturday night can be a trick if you don’t have a reservation. But a few minutes at the bar with an inexpensive bottle of Prosecco and the time flies. There’s a paper menu supplemented by a chalkboard listing daily specialsÑeverything is generally first-rate. (The rotating daily trio of bruschetta are a standout, the polenta fries a smoking deal at $6.) The wine list is short but quite well-priced (bottles are half off on Mondays). It’s the most inviting South Granville restaurant to come along in a long time, and perfect for the pre-theatre crowd attending a show at the Stanley just around the corner.