I would go to a pool. I think you might enjoy that a little more. Are you a member of the Denver Rec Centers? You should be, good deal. Glenarm Rec Center let me put my boat in for free, as long as it wasn't busy. There are other pools with open kayak sessions. I cannot remember who they are though. Someone browsing through this should have more info on the open pool sessions. I heard they are full of hot kayaking girls and the ratio is 20 to 1 girls to guys. This is something I heard about, don't know if it is true. But I can tell you one thing. They are not down at Golden right now.
Good luck...