R.W.
Up North we have a place called AirZone. It is an indoor play place with the large bouncy party inflatables...wow, we always have a great time playing there. Even the adults (especially the men) enjoy playing and climbing! And what a workout too! :) It is always very clean and the staff has always been very friendly on our visits. There is also a baby/toddler mini area where my 8 month old nephew had a ball playing! The website is www.airzonekidz.com if you want to check that one out specifically.
Also, we had family in and recently all went out to Dave & Busters on a Thursday night. It was very kid AND adult friendly. They have a package - "eat & play" that is fairly reasonable...you get a meal (and we thought a pretty good meal...I had the chicken parmesan meal and it was excellent) for $15 and with that came a $10 game card. So, basically my meal was only $5.99. The games range in how much they are. But, we played games for about an hour and a half I think...which was plenty. I am not sure how much they are on the weekends (meal wise). But, you could always go eat at the McDonalds or someplace reasonable first and then go there.
Oh and the drive in's around here just opened up-not sure if it would be warm enough yet for that but that sure is a lot of fun!
I will write back in if I think of more but that is fun stuff we have done and it hasn't been too terribly expensive and the kids have had a BLAST and it has been fairly fun for the adults too. :) Too bad it isn't summer...much more options when it is warm outside.
HAVE A GREAT TIME WITH YOUR FAMILY! :)