Best foot forward?

Only a week to go until the 50+ fashion show at Manchester's G Mex.
Had an email today saying that I should bring along to the rehearsal a "selection of evening shoes and summer shoes to wear with the outfits".
Help! I only ever wear comfy flat shoes
but I have managed to dig out a couple of pairs of presentable sandals and today I found a nice new pair of M &S black wedges in the Heart Foundation Charity Shop for £7.99. Bargain.