Never sell the same seat twice. Trenoxa lets you sell class, workshop, and event seats through your store's normal Shopify checkout, with per-session capacity that can't be oversold even when two customers race for the last seat. Create a class once, add recurring or one-off sessions (each timezone-aware, own capacity), and customers book at checkout with live seats-left shown before they buy. Refunds and cancellations release the seat automatically, and every session keeps a live roster of who'
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