recorded music= a "jam"

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old recorded music="golden oldies"="old school"

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Southern African American culture="downhome"

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statement that an concert host or artist makes when he or she publicly favorably recognise someone at a concert= "give a shout out to [person's name]"

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These may be colloquial expessions rather than slang. I suppose there may be a difference between the two terms...

a command made to an audience to give applause to someone or some group="Show them some love."

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the minister's formal invitation at the end of his [or her] sermon to non-members to join the church="open the doors of the church"
[non-members who want to "join church" walk to the front of the church and are greeted by the minister and deacons]

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the activity that is done at the end of a church service or at another specific time during the service; the activity involves greeting persons standing next to you, shaking the hands, or hugging them="extend the right hand of fellowship"