Joyous caroling fills the evening air along the San Antonio River Walk as more than 185 school, church, company, and civic choral groups ring in the holidays by singing traditional carols on cruising boats. The eclectic mix of participants includes bell choirs, folk groups, and Latino ensembles. Join visitors from around the world in impromptu sing-a-longs from the patios of River Walk restaurants. Takes place 630pm-930pm nightly. Viewing is free to the public. To participate and rent a barge- $125 Sunday-Thursday and $150 Friday-Saturday. Barges can accommodate 20 adults.