The truth is that your girls will probably never wear the bridesmaid dresses you ask them to wear ever again. And here's my reasoning:
1 - It probably looks like a bridesmaid dress in style and fabric.
2 - If you have more than two bridesmaids chances are they will probably travel in the same social circles and will be attending the same events - weddings, bar mitzvahs, birthday parties, etc... Therefore others will know it's the bridesmaid dress from your wedding.
3 - There are very few occasions where one has to wear a formal, floor-length gown so if you choose one chances are your 'maids won't have an opportunity to wear it again.
So don't pick a bridesmaid dress based on whether or not it's truly wearable after your wedding because even if you think it is, it probably isn't.
