The expression "at venue" can be used to indicate a particular location, especially when talking about events, performances, or presentations. There are several synonyms that can be used to replace "at venue" in speech or writing, depending on the context. For example, you might use "on site" to refer to something happening in the same place as you are. Another option could be "in situ," which implies that you are observing or experiencing something in its natural or intended environment. Other alternatives could include "in place," "in location," or simply "here." Ultimately, the choice of synonym will depend on the tone, meaning, and formality of the phrase it replaces.