"Why would a tourist come to a resort if he can't drink?" said Fawzi, of Sabena Management. "People are coming for tours and monuments, and to relax on the boats. If they feel that restriction, why should they come?"
Nahla Mofied of Escapade Travels said the Islamists might restrict what tourists can "wear and do" but, given its importance to the economy, "they may not destroy tourism fully."
Complicating attempts to draw tourists back is the lawlessness gripping Egypt the past two years. With police supervision low, tourist touts increasingly assault guides and even tourists to demand business. In September, 150 tour guides held a protest against attacks by vendors.
"We have struggled with this problem since before the revolution, but now the situation is completely out of control," Ibrahim said.
At the Giza Pyramids, police seem indifferent to the touts. Camel-riding police even join in, pushing tourists to take rides.
Gomaa al-Gabri, an antiquities employee, was infuriated at the sight, shouting, "You sons of dogs" and a slew of other insults at a policeman trying to get money off a tourist.
"They're trying to take away my income," said the father of 11. "In Mubarak's time we wouldn't dare talk to them like this. Now I can hit him with a shoe on his head and he can't speak."
For some tourists at the Pyramids, the chaos is part of the experience.
"I just love it," British tourist Brian Wilson said. "You can't blame people wanting to make money."