Before the wedding, it's a good idea to invite the best man and the bridesmaid out for dinner. This will not only give them a better understanding of your wedding plans and your expectations, but also give them an opportunity to celebrate this important milestone.

In addition, it can also provide an opportunity for the best man and the bridesmaid to get to know each other, so as to cooperate better on the wedding day. If you choose to meet the best man and bridesmaid before the wedding, you should make arrangements in advance as far as possible so that they have enough time to prepare their own clothes and attend your wedding.

Finally, if you choose to meet the best man and bridesmaid before the wedding, you should make sure that they know your expectations and responsibilities and provide them with necessary support and guidance when necessary.