Yeah not even necessarily kids but circumstances and friends/family I used to socialize with more often moving or taking on new responsibilities are usually triggers for me to try to meet new friends or just make some acquaintances. Events are good to step outside your comfort zone where people are more receptive to some convo than when they are running errands, busy, etc. Concerts, art and food fairs, book signings, etc. and in those cases you'll probably already have something to start a conversation about more than just jumping in blind like at a bar or something.