It depends on the lenses you have. If all you have are EF-S lenses then they won't (as far as i know) fit on a film EOS camera as the fitting is EF only.
If you had Tamron or Sigma lenses however for your Canon digital that have a red dot on them instead of a white dot (red dot signifies EF mount white is EF-S), then they will fit on your camera and work ok. If they are zoom lenses they will however have vignetting (dark edges with no or bad quality picture) as it is not filling the full frame of the film, but you can zoom in to a longer focal length to remove this vignetting though, as I can use my Sigma 8-16 from 14mm-ish onwards if I want something really wide. This is a problem you won't be able to overcome with a prime lens however so you will be missing picture at the edges.
If you have EF lenses then all will work ok with any EOS film camera.
I personally have a Canon EOS 300V, and can recommend this as a nice simple film camera to use. It has all the manual modes and various presets like landscape and portrait etc. Whilst the extra options are more basic than a higher end film camera, you can get something like this model for around $30-40 on ebay. This is one of the newer low end models too so has slight improvements here and there.