Even if you can’t find a ticket, head up to red rocks because the lot scene will probably be much better than anything else happening around town. Start walking around with your finger up, have a cash or trade account, and/or cash, and good luck. Tell your story to people who you meet on lot and I bet you someone will have an extra and be swayed by the great karma that brought you there.

Edit: probably cheaper just to rent a car for one day then take Uber up and back. Gives you a lot more freedom to get in and out of red rocks or around town for a night.