I think I've feedbacked something like this before, turn graal bank into a guild recruiting/training. with 3 main rooms, (Link me the tools to build levels if you wish and I will creat this.)

Middle room- Wide open room that has tips on how to run a successfull guild, NPC's as a filler, and lots of tables with paper on them. ("Guild applications", an NPC could stand behind one and touching that paper would read "It's an application for Chain of Memories!!!" ya know, just filler.

Left room- a long room where people in your guild that are able to recruit can hold a table for 7 minutes, it will advertise your guild name above you. touching the table reads your message, then, you tap on the person behind the table, and tell them you're interested, then they can recruit you. (upon getting an empty table you have the option to add a 300 character message, requirements, what your guild does, ect.)

Right room- "Training" shooting range game and a small spar arena (I also like the idea of capping the spar, so someone with 1200 wins cannot fight someone with 2 wins).