We absolutley love Denny's,there burgers are great(i recommend the mushroom swiss),thick milkshakes,and kids eat free on Tues nights,from 4pm-10pm.(I-Drive)
Bennigan's is another favourite of ours,hubby loves the whisky glaze steak,i love the ribs,irish haystack onion rings are also good,free refills on soda.Kids have there own set meal which inc entree(pizza,burger,chicken strips),drink and cookie.(I-Drive)
Golden Corral-superb-what more can i say.(I-Drive)
It may be out of your friends price range but you should give Bahama Breeze i try,more expensive than other places,can be about a 20-30min wait,but there food is a must,we go at least twice whilst we there on holiday.OOh i could drink one of there Strawberry Pina Colada's right now.
Personally we dont like Ponderosa on I drive,maybe we went there on an off day,but to me is was dirty,food warm.