Wow, lotsa questions, but I'll take a crack at it...
9-Pin no-tap tournaments are usually pretty fun, and usually quite inexpensive. There is a fee that covers lineage and prize fund, and I've been them for as low as $12 per person to as much as $35 per person. Usually doubles, and usually mixed doubles. They are almost always handicap, so yes you stand a chance of winning.
The raffles are usually for strike pot or other special pots they might have. Women usually have their own jackpots as do the men. Generally speaking, they don't keep track of your real strikes vs. your 9-pinners.
Good luck if you decide to try it out!
--------------------
Brian
MichiganBowling.com
http://www.MichiganBowling.comFamous Last Words of a Pot Bowler--"Ok, but this is my last game!"