“天河城”盛大入驻北京路，周末相约畅游，惊喜福利等你来！

这句话可以翻译成英文，根据具体语境和语气，可以有几种表达方式：
"比较直接的翻译："
1. "Tianhe City is now open in Beijing Road. Are you free this weekend? (There's a giveaway at the end!)" 这个翻译比较直白，说明了地点、事件和周末的邀请，并点明了文末有福利。
"稍微口语化/宣传一点的翻译："
2. "Tianhe City has made its debut on Beijing Road! Ready for a weekend visit?