How to make Hive people (or whatever) recruitable at bars:

[Saho]

Open up your forgotten construction set.
Create a new mod.
Click on Faction (the word, not the +)
Click on Adventurer's Guild
Hit your pulldown menu at AI fallback - scroll to Races. Add your races. Change priorities to your liking.

I have mine at - (for no particularly good reasons other than I feel that Shek are very strong and should be more rare)
Shek 50
Human 100
Hive Flat Head 80
Hive Tall head 50

I also wanted to improve the chance of level 1 recruits showing in bars:
Click on the + near Faction
Click on Squads
Scroll down to 'Recruits list'
You'll see a number of values for Sword for hire, sword for hire 15 etc in the 'choosefrom list' category.
Click the box next to 'Sword for hire' and raise to 50 (I think original value is 28).

Save your mod and go play.