What and How to wear for a wedding reception should base on what kind of wedding the bride and groom having.
The most annoyed thing for choosing gowns to a wedding is that you have to wear something both according to the dress code and attractive at the same time.Of course you don't want and/or allowed to outshine the bride or groom,so try to be neutral and casual.
If you are a bridesmaid, it's not bad to stay the same dress you wore for wedding.Having the matching dresses on the head table for the reception wedding always looks good. By the way usually you're expected to make sure that all guests wear the correct things,and provide them the advise according the dress code that bride&groom want at their wedding.The wedding reception is traditionally either formal or semi-formal.
Being best men and ushers will also need to wear your suit or tuxedos that you wore at the wedding. You also may remove your jacket, but only if the groom does. Best men are expected to be on your best behaviour and usually need to drive people after the wedding is over, so make sure that you don’t drink too much alcohol, and do not drink any if you are the designated driver.
