(Only for those who like it )
"Westie Lindy" music refers rather broadly and generally to any 4/4 music that does NOT have a Swing rhythm. Although it is not Swing music in any sense of the word, you can still dance Lindy Hop patterns to it because these patterns still fit within the 4/4 time. Instead of syncopating rhythm (shifting the rhythm slightly for emphasis) in triplets with a "bat... ba-bat, bat... ba-bat" beat, the triplet beat is hit more evenly with a "bat-bat-bat, bat-bat-bat." This non-syncopated rhythm in 4/4 time can be found in Soul, Rap, Hip-Hop, Country, Rock, and Blues music, and, as such, is somewhat of a broad "other" category. This "other" category makes some purists cringe, but has gained more and more acceptance over time.
Source: http://www.austinlindy.com/types_of_lindy_hop_music.htm