Haven't been here in nearly a year so was quite happy to re-visit :)
What so special about Happy Hour at Morton's? For one, you can get martinis for $9.95++ (actually it's gone up in price - it used to be $7.90++). The chocolate martini is supposed to be pretty good, but looking at the glass at the next table, it didn't LOOK very appealing. So I had my usual lychee martini - YUMMY! :P The other flavours available are Appletini and Cosmopolitan. Despite all the publicity that Sex and The City gave to the Comso, I never quite acquired a taste for it...
The other really good reason to go for Happy Hour at Morton's is the simple yet amazingly tasty filet mignon sandwiches - totally free! Every half an hour or so, the waiters will saunter into the bar area with trays of the sandwiches and it runs out pretty fast. One extremely tender and flavourful slice of filet mignon wrapped between two slices of lightly mayo-ed soft buns. Ahh.... heaven. I think there's a more extensive finger food menu that you can order from, but why would anyone do that when the sandwiches are free :P
Happy hour lasts from 5-7pm, but to get a seat - you HAVE to get there early. A major gripe though, we got really bad service. The place was full when we got there and the waitress was so grumpy about trying to get us some seats... even though I asked really nicely. And when we got the bill, the waitress said very loudly to "sign the receipt also". There was just something in the tone, and the volume that was just so rude!