There is a place called Pinot's Palette. They have several locations. The concept is that you go in, have wine, and paint a picture on canvas that you get to keep. My husband & I have also gone bowling, which provides a lot of laughter, as well as batting cages, the driving range, and go-carts. I know you aren't big on the heat, but we love going down to Surfside, TX for the day. It's more of a beach community than a touristy type place, but it's nice & relaxing. Being able to bring a canopy & get in the water will surely help you cool down. Also, the Houston Museum District has plenty of really great opportunities for indoor interesting amusements. I love the Butterfly exhibit at The Museum of Natural Science. Afterward, there are plenty of restaurants close by that are great. Try the original Carrabba's on Kirby, Cova Wine Bar on Kirby in the Village, Ava's Kitchen in the Upper Kirby District, or Eddie V's Steakhouse, also in Upper Kirby. Antiqa Osteria is right down Bissonet from the Museum District at Shepherd, and its a nice, cozy Italian Restaurant. Consider a night at Hotel Zaza (formerly The Warwick Hotel). They have the Monarch Restaurant, which serves a nice brunch. Go to an Astro's game! My husband & I did this on a recent date night & had a ball (no pun intended). We cheaped out & got the nosebleed seats, but it was great (view and all). There's something about the good old fashioned National Pastime that is a lot of fun & nostalgic. Plus, I've never met anyone that doesn't like a ballpark hotdog or peanuts. Another of my favorite "in town" restaurants is Ouisie's on San Felipe near Buffalo Speedway. Great atmosphere, excellent brunch, and a refreshing, beyond typical menu that is wonderful. Enjoy your time, sans children, and enjoy revisiting your city!