Thank you AJ, I will definitely visit the zoo and maybe the SAC museum, but casino is not my thing. All downtown hotels are fully booked for that weekend May 5-7 since more than 20,000 people will be swarming the Qwest Convention Center to listen to the "Oracle of Omaha" (myself included). I will be staying in the Residence Inn on Dodge Street which is more than 4 miles away from downtown. It's very kind of you to look up the restaurants, thanks again.
Busybee