At the last wedding I went to the father gave a speech, my FI (a co-best man), the other best man, two MOHs, and then these two random ladies who were friends with the bride's mom got up and each gave speeches. It turned into an open mic night! I think it's important to set limits on who gets to give speeches so they don't take the whole reception. I have heard a lot of drunken speeches, so I like the idea of doing them at the rehearsal dinner.