Millimeter wave (mmWave) multiple-input multiple-output (MIMO) systems have important advantages such as large bandwidths and small wavelengths that enable large antenna arrays. However, the cost and power consumption of the hardware elements is extremely high in mmWave. This limitation makes precoding and combining for multiuser MIMO more constrained, making non-viable the use of fully digital precoders. Hybrid analog-digital transceiver architectures allow to reduce radio frequency (RF) hardware complexity but still, a significant number of RF chains is necessary to accommodate the transmissions from multiple users. In this work, we propose to use a zero-delay analog joint source-channel coding method termed scalar quantizer linear coding (SQLC) to reduce the number of RF chains at the receiver of an uplink multiuser mmWave MIMO system. The use of SQLC allows grouping the users in pairs and halves the number of streams to be managed by the multiuser MIMO receiver. In addition, SQLC performs particularly well when users transmit correlated information.