the International Rollei Club

Hello, this is my first post.

I was wondering if someone could help me out. I am wondering how to take grainy photographs. The kind that you sometimes see in photographs from dirty jazz clubs of the 1940s and 50s.

I use a Rolleiflex TLR from 1954. And I use ADOX CHS 100 film (100 ISO).

As I understand, in the 40s/50s, 100 ISO was considered "High Speed" film.

So how could I get grain without uping the ISO?

Thanks alot and I would be greatfull of replys!

Lewis