You will not find USA welcome site that has non-zero roulette. I know only one casino that has it and its not USA welcome. Anyway you can find the best USA welcome sites here
Depositing for US players is with all access visa gift card cause it doesnt have gambling filter.

Sadly there aren’t any like ‘Betfair’ for US, as only ‘Realtime gaming’ powered casinos are available to US players. And many ‘RTG’ casinos are not worth the cyber space they are written on. I can though point you towards US friendly trusted RTG casinos here and some descent roulette strategy.