mmhh - I've seen a variation used succesfully
stand back until 3-4 reds/blacks or 3-4 odds/evens have come up in a row then bet against same outcome again.
Of course you must have both pocket and table limit to be able to double up a few times after that - ie you rarely, if ever, see eight to nine reds/blacks in a row, at least I don't
Same principle can be applied to columns/rows/blocks but you always take the chance the house numbers might come up - i think that bit is worse in the US than elsewhere do you have 0 AND 00 - not so elsewhere.