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Advances in speech technologies and generative AI (Gen AI) have enabled the possibility of generating conversational cues to improve engagement and creativity during small-group discussions. Such cues could contextually adapt and guide a live conversation, or conversely, serve as a distraction. How do conversational cues impact ideation and social interaction? How does the meeting modality impact the effectiveness of cues? We built a system, CueTip, to generate and deliver real-time contextual conversational cues using the GPT 4o-mini model. In a 2x2 study, N=172 participants in dyads completed a brainstorming task where they received cues or not during either a virtual or in-person discussion. Cued participants’ ideas and discussions were more topically diverse than Non-Cued participants. In-person groups noticed slightly more cues on average than virtual groups. We discuss implications for designing effective conversational cues.