Jehovah's Witnesses implicitly regard kingdom halls as holy places. Both in talks and in literature, the kingdom hall is sometimes described as a "center of pure worship in the community". Kingdom halls are dedicated to Jehovah, in immitation of the fact that Solomon dedicated the temple to Jehovah. There are also Watchtower policies stipulating what cannot be done at a kingdom hall - even though the very said things can be done elsewhere and presided over by elders and attended by JWs in much the same format as done at the kingdom hall. (think of who qualify to have their funeral at the kingdom hall, as one example)
All of the above show that JWs regard the physical kingdom hall as a holy place. But are christians supposed to view a physical meeting place as a holy place? I think Jesus' answer to the Samaritan woman's question of where should persons worship God, covers this issue. Jesus indicated that true worshippers would not be required to worship God at prescribed physical locations regarded as holy, but to worship him in spirit and in truth. (John 4:20-24) There are thus no holy places for meeting - only holy meeting sessions convened in Jesus' name and presided over by those worshipping God in spirit and truth. (Matthew 18:20; 1 Timothy 3:1-10)
Note too, that the NT makes no mention of christians constructing places of worship and dedicating these to God. They simply met in homes. The whole Watchtower concept of dedicating a building as "Jehovah's house" of pure worship seems to be an atavism to the temple worship arrangement of OT Judaism. It demontrates that Watchtower has not progressed to full christian maturity but is still allowing itself to be sucked into OT legalism, slaving for them all over again, even after the christ has fulfilled the law. (Galatians 4:9)