>>12764978vegas here (not in vegas, live in town over).
there is a system for roullette but it depends on how many '0's there is on the wheel. Big casinos here have three '0' spots: '0', '00', '000'. If you see more than one green pocket on the wheel, leave.
Stragaty: alternate between two positions: red or black. Make sure you get free drinks.
Craps: Play from the 'don't'. put minimum on 'big red' when you are the shooter. Stay away from the field, unless it's a triple payout. Make sure you get free drinks.