I see people in the lobbies with capes on,,,,how and where do you get these ?
Converse with fellow players
@VAMPIR0-X It's most likely the Alliance Cape accessory. (Not sure if any other Cape accessory made it to the NA version yet.) If you are in an Alliance and either the Captain/Leader or an Officer unlocked it through the Alliance Quarters Expansion menu. Then you can equip it by selecting 'Equip Alliance Accessory' in your Alliance menu.
Do note, it replaces/takes the place of your 4th accessory spot. And not to forget the Alliance can only set up one accessory at a time. If you tried to equip the Alliance accessory and it shows anything other than the Cape. (Not sure which Alliance accessories are available yet in the NA version, the JP version has the Cape, Beret, Scarf, Crown, Shield and a Planet + Moon spinning around you accessory.) Then you might have to ask the Captain/Leader or an Officer if they would like to change the accessory type to the Cape.
I have no idea if you are a member of an Alliance or not. But here's a quick simplified roadmap on how to acquire the Alliance Cape from scratch. Check at which step you and or your Alliance are and which ones you still need to do.