Just when the first-generation British Invasion bands galloped ahead into pop art in 1966, the Small Faces worked a heavy R&B groove on their 1966 debut. That's not to say that this pack of four sharp-suited mods were unaware of the times. If anything, no other British band of the mid-'60s was so keenly tuned into fashion, the four Small Faces capturing the style and sound of dancing pilled-up mods better even than the Who, possibly because the group could carry a groove better than the Who, as this tightly propulsive debut amply illustrates. Like many '60s debuts, The Small Faces is split between covers, songs the label pushed on the band, and originals, some clearly interpolations of songs they'd been covering in clubs. "Come on Children" echoes James Brown's "Think," and "You Need Loving" is based on Willie Dixon's "You Need Love"…