I have a few looks I like:
1) Black pants, black top and cream tuxedo style jacket with heels (sandals or pumps)
2) Black pants, black and brown floral blouse, faux fur coat, pumps or ankle boots
3) Blue jeans, black top, kinomo jacket and heels
4) I also often choose a dress - in winter a wine one with cream spots with boots or in summer a teal green one with heels or slides
If we are not walking I often choose to wear heels for these occasions - or sometimes even take a bag and change into heels as I arrive. I prefer a clutch in the evening but I will take a larger bag if I do this.
Because my life and job is casual I tend to use these opportunities to be a bit more dressy than I need to be.
The right jewelry, hair and makeup help me feel a bit more dressed up too - larger earrings are my go to here.