I mentioned above that there is a disc/frisbee golf course at a public park here which might include the others. They also have beach volleyball courts. I guess it is Revolution Park--it is where the Jeff Adams Tennis Center is (the part I know) on Tyvola Road.
The ones that don't want to play could drive the golf carts?
There are large party boats on Lake Norman.
Bank of America stadium could be interesting--I don't know about tours. We've been on one with a charity event but not complete.
I've been on tours of Johnson & Wales and LOvED it, but I'm a foodie.