I think Valhalla Knights 3 is the only game where you can recruit party members from a red light district. Let’s back up for a second. Valhalla Knights 3 has a red light district where you can spend time with female cast members like Cheria if you pay them money. This starts a "sexy time" event where you use the touch screen to increase how a girl feels about you. If her feelings for you are high enough you can trigger a quest. Raise her affection to the maximum level and she *joins* you in battle.
If turning hostesses into dragon slayers isn’t your thing you can create adventurers too. Valhalla Knights 3 has a bunch of different races including human (boring), dwarf, beast, nightmare, and machine. After you create a team you can challenge another player to a 7 on 7 fights over ad-hoc connectivity. Win and you can earn arena points which you can use to obtain weapons and armor. You can also loot bodies of fallen foes by giving them a "hands on" search.
Valhalla Knights 3 comes out for PlayStation Vita on January 31.