Yeah, should be absolutely fine, especially with the jacket as it will look very smart! (note: Princess Di and Victoria Beckham have had similar looks)
I have a nice comfy pair of hipster jeans that im really comfortable in, and i dress them up with a pair of nice sandals, smart jacket and a classy top, and the fact that im in denims is soon lost.
If you have an UC ticket, i dont believe there is any restriction on attire in the clubhouse anyway, although if you have paid entry it will say 'smart dress' on the coupon. Although, many of us can vouch for the not so smart that are in there on a frequent basis!
I think us ladies also get a certain amount of leeway too
