Examples of design variations which meet the key requirements for good bike parking.

Artistic Designs

This closed form design is aesthetically pleasing but provides limited support.
The challenge with artistic designs is for users to know whether they are bike parking. This design provides some clues.

Functionally Aesthetic

Rounded edges, a closed form and good support and locking points make this a good alternative.
Planter Bike rack.
Source: http://johnpacker.com/bike-parking/862/

Other Options

The ‘lollipop’ design has rounded edges, appropriate height, and stainless material. While wider racks are better, this simple design is permissible in dedicated bike parking areas. Not appropriate adjacent to through zones because it lacks a cane tapping element and therefore is a hazard to the visually impaired pedestrian
Although it should be wider, this laser cut design meets some of the key requirements.