You can view the coupons on line.
Hooters,Tropicana,Planet Hollywood,Hard Rock,Strat,Circus Circus,Sahara and Terribles all give Match plays as part of a funbook or sheet. Some are one time( Hooters,$25),some are weekly( Strat,BJ pays double),the rest are in between.
El Cortez gives out of staters two funbooks containing a $5 MP,$5 free slot play and a $5 discount on food.You need to email them in advance.
Many casinos give small amounts of free slot play($5-15) to new members,some give additional for giving an email.
Best offers I'm currently aware of are Arizona Charlies which will refund $100 in slot losses to new members on their first day. Harrahs does the same ,only its bounceback cash where Arizona gives you cash.