MaBelle's is a great manicure/pedicure joint tucked away in the Marina... the place is very small and unassuming so you might just dismiss it as "another nail place" when walking by.
However, this is the best "budget" nail place in the City! Where else can you get a good mani/pedi for under $30 AND in a store WITHOUT fumes? That was a definite plus when I was preggo!
Since there isn't a lot of room here you might have to wait a bit, but the wait is worth it, in my opinion.