Mics without a dj

Hey everyone! My FH and I decided to cut costs and do our own music instead of hiring a DJ. We have put together a Spotify playlist for Dinner and one for after dinner. Because his family is more conservative and a party isn't the type of reception either of us really imagine, we are planning to have music going for an hour or 2 after dinner during our "social hour". Our venue is outdoors with plenty of space for kids to run and play and people can socialize and celebrate. My question is, does anybody have any ideas on microphones or something we can use for speeches and our groomsman to announce events so that all 150 people are able to hear them? It would be great if I could find a mic or an app that we can use with the 6 Bluetooth speakers we have!