We ate there last summer around 6 p.m., the dancer came out around 6:15 or so but the show was short IMO. Maybe around 20 minutes? There also is belly dancing just outside the restaurant near the water. I would think that they come out at lease once an hour for new patrons.
We ate there last October. In our hour-long seating, we saw the BD twice.
The show was good, however, we feel the Tangierine Cafe has by far much better food! And outside, there is sometimes a show with a BD and live music across from TC.
The dancers comes out multiple times in the evening. So just about anytime you will get to see her once.
The show I saw wasn't even 20 minutes. That is a standard bellydance set (and 20 minutes is a LONG TIME for one person to dance continuously, so that isn't short! , and it was shorter than that. But maybe it was a short evening, compared to other times.