David Lee Roth performs at House of Blues at Mandalay Bay on Friday, Jan. 10, 2020. (John Katsi …

David Lee Roth performs at House of Blues at Mandalay Bay on Friday, Jan. 10, 2020. (John Katsi ...

David Lee Roth performs at House of Blues at Mandalay Bay on Friday, Jan. 10, 2020. (John Katsilometes/Las Vegas Review-Journal) @JohnnyKats