So I googled everywhere and here and all I can find is
https://forums.alliedmods.net/showthread.php?t=264185 which is nothing attached.
I am a new pug server hoster and the only admin is me. And I am not going to play all the time.
We have a few troubles such as long-time rolling & picking, which became even worse.
So I don't know whether there's a plugins like AsiaFortress's pug server. Which can pick your member in a menu. Show up the +1 list if someone chat +1 on the picking.