I'm invited to a 50TH birthday party on the 3rd, it's at night but invite says casual. I have a lot of options but what I'd really to wear is a sequin mini. It's in the blue/gray/tourquise family and the patern is big circles, don't think polka dot. I have flat silver sandals with blue stones and few crystals. I'd like to pair it with some kind of casual tank. I also have a large multi srtrand necklace with what looks like light blue sea glass beads, think pearl size beads but lots of strands. What do you think, too dressy? I'll post pictures latter. Thanks.