Yes, you may be able to claim depreciation on your pool table and maintenance expenses for this asset. The room with your pool table in would only qualify as a home "office" if it is exclusively used for business, and if it is the principal place of your business. See the following link for more information.
https://turbotax.intuit.com/tax-tools/tax-tips/Small-Business-Taxes/The-Home-Office-Deduction/INF120...
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