I often see players shouting "LF guild" or "We are looking for new players for our guild" in world chat. However, this is not a very effective or healthy way to recruit members. Sometimes, guild leaders may not be online, and interested players can't reach them to join the guild.
Could you consider adding a new feature for joining guilds? For example, implement an application system. If a guild's recruitment status is set to "open," then players without a guild should be able to send a request to join. Additionally, there could be a system message in world chat that highlights guilds currently recruiting new members.