InB4 translation: Remilia: Join us, Meiling.
Meiling: I dunno.
Remilia: You get free food and a bed
Meiling: I'M IN!

InB4 translation:
Remilia: Join us, Meiling.
Meiling: I dunno.
Remilia: I'll let you sleep with my maid.
Meiling: I'm in!

I suspect Remilia is asking Meiling about what she offers the club.

Nope I was dead wrong heh.

This is eerily similar to how it works IRL. The quickest way to a student's loyalty is through his/her stomach.

Isn't this how the Light Music Club managed to keep Yui? Tea and Cakes?

Seems I was right, except about the bed.