I don't know about Fri./Sat. nights, but after work and during the day on weekends it's usually pretty effortless to get a lane at Kings. Some days there's corporate after-party reservations blocking off large numbers of lanes, but even that rarely induces a wait.
I want to see some candlepin bowling come to downtown. The one on East Broadway in Southie isn't subway-walkable without boarding an overstuffed bus, and the one in Eastie near Logan is a bit of a hike from downtown. Everything else is either too small (just 7 lanes in JP), or out in Dorchester parkway/strip mall hell.
C'mon...this is Masshole kitsch! If they can tart up 10-pin for the upscale set, they can tart up candlepin. Some people at the office Xmas party might want to chuck a somewhat less-cumbersome ball for the sake of feeling non-awkwardly involved in the festivities.