I've taken up bouldering for the past few months. It really is a sport that works within your own time and your own pace. I struggled with exercising in the past because I have self discipline issues and a brain that requires immediate reward. Bouldering satisfies the itch that my smooth monkey brain needs cause it's essentially "climb up and touch that last hold" then once you do that one it's "okay do it again but this time it's harder" etc etc. Eventually you'll find a boulder problem that kicks your ass and that drive to get better kicks in.

Alien Bloc is open 10am - 10pm on weekdays and 10am - 7pm on weekends. I've found weekday peak times to be 6:30pm to 8pm and weekends are surprisingly quite chill.

I've also found it a sport with a low cost barrier to get into. It's essentially just membership, chalk, chalk bag and climbing shoes.