To my knowledge they usually only accept 6's and 7's, not 5's... I would not recommend a 5 sign up unless other pool halls are a lot easier than the one in my area.
When I played it was SL7 minimum to play.
But if you let in lower SLs and there are enough of them, then your more likely to play them as well...but if not, then I may tend to agree unless you understand that going in.
I did like the format tho, nice change of pace. No handicaps is such a nice bonus too.